artillery ballista several targeting issues

played an artillery ballista tactician in 0.2 and noticed several issues with targeting in some special boss fights

some of these issues have been adressed in other bug reports already, but i confirmed them and summarize them in one thread (this may of course not be all issues).

1) zalmaranth (titan) and map version (forge): ballistas either do not target the boss at all (sometimes, rarely) or only his hands - prbly the designated hit zones. i assume smth is off with either the hitboxes or the ballista AI or both, but compared to other boss fights, this one takes extremely long, because the ballistas do not efficiently attack the boss

2) tor-gul (defiler) and map version (hidden grotto): same issue as with zalmaranth, but i have the impression this is even worse because of the multiple hands of the boss (ballistas seem to become confused in where to attack) and the hitboxes seem even smaller

3) chimera (wetlands): ballistas do not target the stone pillars, because the boss is untargetable during that phase and the stone pillars apparently are not designated enemies (neutral?)

4) doryani: not mechanically annoying but funny to see - doryani apparently loses the "enemy" status very late after the boss fight and the ballistas tend to keep attacking until his "i have active dialogue pending" icon appears