More applicable to battles in HoW because of one thing, Rings of Free Action. I mean come on... 3 of them from the same guy????
Anyway, with the 2 from Kulduhar, and one more from a spell, you can cast multiple Webs and watch your men run circles around the stuck enemies and poke them in the eyes. Heck, if you want to, you can even get your Mages to melee them because Held enemies are considered automatic hits.
