I am gathering mods for my game before I play it. I like to play my Bethesda modded

Anyway, I'm looking at IWS increased spawns because I like alot of enemies. However, I remember using a similar mod in Oblivion and the enemies often slew the quest givers which meant it was annoying to play the game and do the quests. Is there any mod that gives the quest givers invincibility (or the ability to not be killed)? Perhaps IWS is really good and it doesnt have this problem?

Next, I'd like a mod to improve enemy AI. I notice XFO has tried to better AI. Is this the one I should install? Does it work well? Any others?

Actually, while I'm at it, does anybody know of any good mount mods? Animals to ride? Vehicles to ride?

Also, how about mods for herbing, like in Oblivion? Ones that add more flora, and allow them to be harvested, as well as new recipes for crafting?

Cheers