(For Experiment 3: Mankar Camoran vs. the People of Cyrodiil, scroll down the page)
Experiment 1
Purpose: Which individual or combination of vanilla (no SI or add-ons), non-essential character(s), if any, is capable of killing Umbra while keeping at least one member of the party alive?
Background: Umbra is a level 50, non-leveling Warrior that haunts the ruins of Vindasel. She is part of the quest Clavicus Vile, where the player must kill her and take her sword. The underlying purpose of this experiment is to see what would happen if the player let someone else try to kill Umbra; can other NPCs take down Umbra without player help?
Hypothesis: My original prediction had Umbra falling prey to five or more Level 10 well-armed NPCs.
Plan: I started a new game in the Imperial Sewers. I used a normal Imperial Male under a custom class, but I took out all combat capabilities to ensure he would not be part of the combat. I then stayed at Level 1 throughout the entire experiment. I planned to travel around Cyrodiil, finding NPCs, weapons, and armour with which to raise an army to take down Umbra. In order to get the chosen subjects to the Ayleid ruin of Vindasel, I grabbed a Companion Share and Recruit mod. If you would like to replicate this experiment without mods, use a high-level command humanoid spell.
Trials:
1. My first attempt was simply a test of Umbra's combat capabilites. I traveled to the Imperial City and recruited two Imperial and two Redguard commoners. Three were Level 4, with one Level 5. They were armed with iron daggers and no armour. I brought this party to Vindasel for a showdown with the great Umbra.
The result was pretty obvious. It took only ten seconds for the bodies of my companions to hit the ground. Umbra had not even shed a single drop of blood.
2. I decided to step up my game a bit. I chose three Fighters Guild members (Level 11, 12, 19) and three commoners (Level 4, 4, 2) for my next strike force. The commoners were armed with iron weapons and a single silver longsword, although the FG members were armed with iron or fur. With the levels of these new members, I felt like it was time to see what Umbra was really made of.
I was a bit surprised by this fight. I was almost anticipating victory; it was some shock when Umbra did away with my soldiers in short time. Unlike the last ecounter, the tough gal lost a bit of health, but she was still healthy at the end. It was no matter; I had yet to play my Ace.
3. Now aware of Umbra's power, I decided it was time to finish things. I gathered five FG members of the Anvil guild as well as two commoners. The FG members ranged from Level 10-15 and were armed with iron and fur. The remaining commoners were armed with assorted pieces of steel and iron, but I was betting my pieces on my FG members. Considering there were five FG members with a total level sum of around 50, I was certain they would triumph.
Now this was shocking. Though they came close, Umbra still killed every single one of my companions and still remained on her feet. This opponent was much tougher than I had originally thought. For the first time, I realized that I had badly underestimated Umbra.
4. Getting weary of Umbra's power, I started to just throw whatever I could at Umbra. I grabbed a Level 20 FG member, a Level 11 Mages Guild mage, and a Level 4 Dark Elf commoner, and began the long path back to Vindasel. However, at the last minute, I grabbed the wandering FG porter as almost an afterthought.
And...no surprise...another massacre. I had sent nearly four waves of soldiers at Umbra, and none of them had brought down this mysterious warrior. I was near the end of my options, and was starting to wonder if victory was even possible. However, I noticed something odd during the fight. The Fighters Guild porter, who I had almost forgotten, had actually put quite a dent in Umbra's health by himself. Perhaps...
5. I now outlined my last stand against the onslaught of Umbra. I gathered three FG porters and sent them against Umbra. If they failed to bring her down, I wasn't sure what I would do.
At long last, the mighty Umbra fell to cold steel. The FG porters confronted Umbra and drew their swords. After an epic battle worthy of song, the ebony-clad girl finally bit the dust. But it came at a cost: one of the porters was dead and another was badly wounded.
Conclusion: Umbra is one tough chick. She killed a record 22 Cyrodiilic residents ranging from Level 2 to Level 30. She left the Waterfront District, the Anvil Fighters Guild, and the Chorrol Fighters Guild quiet. She earned her place as the toughest NPC in the game.
I'm sure you're wondering what the statistics are behind all this? Well, I looked it up in the TES:CS. A FG porter is Level 30; three meant a sum of 90. That means Umbra was outmatched 50 to 90, but she STILL killed one of the porters and carved a chunk out of another. One of the reasons for this is Umbra's armour and weapon; they are among the best of in the game. The other is her ridicolously high blade level; her power attacks could kill a commoner in a single blow.
So, who is the best non-essential NPC to single-handedly duel with Umbra and have a remote chance of winning? Well, Count Goldwine of Kvatch, the Night-Mother, and Hannibal Traven are also set at level 50. Only problem is Goldwine is dead, the Night Mother is a frickin spirit, and Traven is essential (and if the MG quest is done: dead).
Below these 50'ers are Vilena Donton and Glenroy at Level 41 and Captain Renault at Level 40. Donton is essential, Glenroy won't work as his stats are rigged (he has 1000 health), and Renault usually dies from the assassins.
The only characters left are Baurus and Oleta at level 40. Baurus loses his essential tag during the game, but at the same time is reduced in level and health. Oleta is non-essential, but she's a priest and probably won't last long against Umbra the Warrior.
You're very best bet is Captain Renault. If you're good at exploiting glitches, kill the MD assassins before they hit Renault. You can then recruit her as a companion. She has 295 health compared to Umbra's 394, but she's wearing a special brand of Blade armor that is more powerful than Umbra's initial loadout. But it's still highly unlikely she'll win; your best bet are the FG porters.
In conclusion, it is entirely possible to kill Umbra utilizing only vanilla, non-essential characters. You just have to throw a crap load of soldiers at her.
Experiment 2
I'm sure you're probably wondering about the exclusion of essential characters. I mean, with cheats, you can turn off their essential crowns and go rambo on some bad guys. To be fair, I've staged one last battle that is truly the most epic I have ever seen.
If you REALLY want to test Umbra's mettle, find the only vanilla NPC powerful enough to challenge her: Vilena Donton. While only Level 41 and health 340, Vilena Donton is a warrior and the only NPC who has the stats to equal those of Umbra (Travis, the only other viable option, would be gutted in seconds). What you'll need to do is armor her up in Full Orcish, which is equivalent to Umbra's starting armor. Then put the only other vanilla sword powerful enough to challenge Umbra in her hand: Goldbrand. While it does not do as much damage, Goldbrand has a fire enchantment that makes it worthy of matching Umbra's advantages. Finally, use the setessential cheat to make her killable.
So I set up the battle on the very bottom floor of Vindasel. Both combatants had equal armor and almost equal swords. Their equipment was repaired to 125% by myself. All that was left was to see the results. The pictures of this battle are below:
http://i623.photobucket.com/albums/tt317/Kaw434/ScreenShot6.jpg
http://i623.photobucket.com/albums/tt317/Kaw434/ScreenShot7.jpg
Vilena struck with Goldbrand first, staggering Umbra slightly. But Umbra came back with a devastating power attack that caused Vilena to falter. Yet neither of the combatants gave, they fought for a good thirty seconds; sparks flying, fires burning, and magic swirling. And when the smoke cleared:
http://i623.photobucket.com/albums/tt317/Kaw434/ScreenShot12.jpg
Shocking, to say the least. Vilena Donton had just done the impossible by killing the strongest NPC in the game. How? Let's put it this way: The following picture shows how much health Vilena had left at the end of the fight.
http://i623.photobucket.com/albums/tt317/Kaw434/ScreenShot13.jpg
In other words, it was anyone's fight; one more blow could have had Donton dead instead of Umbra. So, in a quick conclusion, a previously essential vanilla NPC has a chance to kill Umbra.
In conclusion, it is possible for a vanilla character to go up against Umbra and win. You just have to turn off the essential crown.
Important Final Note: When testing any of the above things, make sure you stay at Level 1! Umbra does not level with the player, so the higher level you get, the easier it is for leveled NPCs to kill her.