[Xanthul]

Well the final boss didn't seem overly difficult to me (I don't have any Improved anything mods though, just the official patch and the widescreen mod, Insane difficulty level). I "cheated" in a way though because I saved between the different stages, but a few decoy swords and devas plus whirlwinds from my three tanks worked just fine, I only had to reload a couple of times for the fallen solar and I had plenty of spells and whirlwinds left when the whole thing was over.

I found Draconis and specially Abazigal to be the only challenging boss fights in all of ToB. The rest of the Bhaal spawn and Demogorgon were kind of disappointing.

I will probably install the improved bosses for my solo sorc and see how it goes.