Henchman AI improvement

Please make it so henchmonks heal mission-critical allies as if they are party members!

I've now failed Thunderhead Keep 19 times. I usually have to wait a half-hour in between tries becuase there simply are no PC healers in any of the districts (It's rare to see more than 4 Mo/X or El/Mos in any of the 2-3 districts, and usually half of them are AFK). And you can't do it with henchmonks because they give party members preference on healing over the mission-critical ally, no matter how low his health is.

so you get a guy with monk secondary, get him to equip some healing spells, and task him with mainly healing Jalis. That's how my group got through with Mhenlo and Lina.

I got through Thunderhead with henchies...only henchies...because people kept screwing up the defensive part...

Never had a problem with keeping Jalis alive and I have an E/N, so no healing spells(unless there's a corpse near him, then I *could* have used well of blood, which I didn't)