I assume that Noob lvl has some more value when fighting Ubers or colossals maybe?
Not a big different in terms of dps.
Gigantic difference in terms of survivability as instead of unlocking all the gear options you need elsewhere, you are stuck fixing the consequences of trying to get more flat dmg from your poor weapon choice.
But all of it doesn't matter much as of right now.
You can do ubers with a naked warlock using his starting dagger and mana pots, letting his demon tank and attack with enough range to avoid all dmg.
Not possible offline because of how regen works differently, but online, due to the returning echo blades, even at 0fcr you can neglect all regen.
The shiver armor can be problematic if you can't position your demon correctly, as you trigger up to 10 ice bolts per cast.
And since echo does not apply CB%, an easy fix is to just use mirrored blades (you can even get up to 26% CB when consuming goatman).
Anyway... for the purpose of stacking res and being able to just rambo down the ubers without having to prep and think about anything, I'd just use obsession.