So yeah, as the title suggests, I'm thinking of doing a playthrough in which at the earliest opportunity, I murder every being - mortal, immortal, elemental, undead, construct, whatever - that can possibly be killed, right through the saga. That's the whole premise of the challenge - I murder everything in the entire game. Now, obviously there are exceptions as killing certain beings would prevent me from advancing the story, i.e killing most people in Candlekeep would turn Gorion aggressive, and certain beings are unkillable/insta-slay you if you try anything. My question - as someone without in-depth knowledge of game mechanics - is A: is this playthrough doable, for example will the near-constant 1 rep cause too many problems, and B: can you guys help me out with examples of individuals that are unkillable in the game.
One note, I don't need to solo the game necessarily, so (necessarily evil) party members can join with me, but I need to kill all NPCs that won't be in my final party and then slay and boot whoever's left before the end of the Melissan battle.