Well, unless someone manages to create some sort of "Dungeon Master AI" that can create new high quality quests on the fly as a human dungeon master can (sort of), you will always have restrictions on the computer compared to real pen and paper sessions with friends.
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And about the Kelthric fight, I dont remember how I solved that, I only remembered it was painful, but I did it "regular". However this walkthrough has an amazingly easy solution:
In short you buy bombs and throw them in a stack of 8 (for Kelthric) and 10 (for the Apostle) not on, but right next to your target. That wipes them out, easy.
Oh and if you buy the bombs in Last Night Inn, you have to throw away the first bombs you buy, because they are bugged and will blow YOU up instead of the target.
