Xzar and Perhaps Montaron Mod (Spoilers)

I'm planning on doing a mod that brings Xzar and possibly Monty into BGII. There are multiple possibilities:

1. The Darkest Day method - Xzar was not really Xzar; reanimate Monty
2. Xzar kills Lucette (may or may not lead to reanimation of Monty)
3. The bird was Monty all along

I could have bird Monty become Xzar's Boo-like familiar.

As far as I can tell, none of these methods break Jaheira's romance quest, but I want to know what I should pick.