Or you can do what I do in my installs to deal with it once and for all.
I've had troll problems in the past too and this is the only "sure" workaround I ever found for my games in order to never have troll bugs again.
Just install the "streamlined trolls" component from Weimer Tactics Mod. It completely changes troll scripting granting them some high physical resistances but the trolls never ressurect or anything. When their hp are reduced to 0 they just die, instantly.
Just use it AFTER bp. It is completely compatible as far as I know / tested.
My two cents,
Rad.
i installed streamlined trolls component but torgal still doesn't die!!!
i also replaced the old torgal.cre with the new one. still no difference
i also tried the transform to mind flayer trick, that doesn't work either
what to do?!?!?!?!?!?!
edit: okay, nevermind, the mind flayer trick worked. but only after many tries