You don't need the end tier perk to sneak attack "right" (or to sneak attack at all), and in other TES games you could routinely pull off sneak attacks without being almost max.
I don't understand your example. What is it you're trying to argue? In your example, the numbers are the same as they would be in the game (8 x 15 = 120). Was that your point? Sorry, just not following it.
The fact the numbers ended up the same, WAS my point. It will also end up that daggers, though not as good as sworda, are better in the unavoidable combat situation.
Also, I was referring to the perk you need just to get x15 sneak attack. It's at the end of the tree. Actually you gata pickup the bow perk, wasting it if you don't use bows to begin with.
What I meant by "doing it right" was that with out the x15 perk, daggers are far far far inferior. Swords will ambush harder.
Right now, daggers are just a mid-late game 1 time use only item, that you would wana drop if you lost your cover or didn't 1 shot the enemy.