Awhile ago I started a BGT-Weidu game with the intention of playing through the whole thing. Using Spell Revisions and Tweaks Anthology along with Unfinished Business and fixpack.
Things worked pretty well till I got to the final Sarevok fight in BG1. Totally broken. The enemies had BG2 high level stuff like Contingencies and Tattoo of Power, Flesh to Stone etc. In the first attempt they petrified Ajantis before I got a single attack. I played for a bit more, everything was absurdly hard, so I decided to reload and try again using Protection from Petrification.
This time Contingency Death Spell somehow insta-killed my 8th level Ajantis at the start of the fight. (This is not legal under D&D rules.)
Tried it again and Angelo constantly had fireballs going off - from arrows of detonation maybe? - and Ajantis was taking damage from them despite having an Anti-Magic Shield scroll up. (Not legal) Edwin also was getting wiped by them despite having a Minor Globe up (not legal).
My defensive spells simply did not work at all.
Sarevok, who was perma-hasted and hit three times to my one despite me also being hasted, hit AC -9 on a 2, all the enemies made saves on a 2 despite Greater Malison. Basically nothing worked as it should and the fight was impossible.
I finally killed Sarevok by using Ctrl-Y to kill his entire party plus the extra Skeleton Warriors and Battle Horrors that kept appearing, and spamming summoned monsters from a wand endlessly to block him while I shot him hundreds of times. Still lost all five other party members, which of course defeats the purpose of playing BGT in the first place, since none of them would transition to BG2.
This experience was so ridiculous that I am wondering which mod is to blame. I assume BGT is what made the enemies 30th level or whatever they effectively were. But the spells not working seems more a Spell Revision mod thing. Curious if anyone else has run into this in the final fight. I have seen spells not work before in Durlag's Tower, but in that case they simple failed to go off. Here, the graphic effects and portrait symbol were there, but they provided no actual protection.
I am loathe to use this mod to continue on to BG2 even if I use Ctrl-Y on a reload to just wipe out Sarevok from the start, since if the spell defenses don't work, BG2 is a waste of time.
Edit: Since Death Spell doesn't exist in BG1 I could not read the spell description, but from looking at my first edition PHB it looks like it can kill up to 8th level creatures, so that would be legal (although not possible in BG1, so this seems the BGT mod is adding this high level spell and making Sarevok's henchman high enough level to use it).