Bif can't fight properly using his boss fighting style without his boss AI. Adding his AI in ide is a real pain in the @ss since it takes a lot of tries. I was able to add every boss AI to each boss in the ide without crash but I uninstalled my game temporarily.
Boss AI what did you mean?
The most common AIs in the game are AI (used by peds) and PlayerAI (used by the player). There are boss AIs that are only used by bosses in their boss missions and not in freeroam.
This AI allows them to use the missing moves in their fighting styles, for example Russell counter attack, Darby evades, Gary grapples, the Mascot ability to run and taunt and Edgar ability to pick up leadpipes. The bad thing about boss AIs is that when peds use them they can't interact with the player nor the peds unless they are fighting.
@Deadpool : you can't make them again??
I can if I get ide and script files. The bad thing is that I have no way to test it.