"Well, it seems that Groknar isn't the only loud warrior."
Darian manuevers so that he can see the creatures that Groknar, Bellus and Qataria are charging (probably right next to Verra). Hmm. As hideous monsters, these creatures will likely be stronger in body than in mind. The situation wasn't quite right for Confusion, since the foolish half orc would attack anyway. But the overall power of these creatures was unknown, and it wouldn't do to waste powerful spells unnecessarily. If they seemed to be weak, then a magic missile barrage to weaken or finish off those left by the combat experts would suffice. And if the creatures proved to be tough foes, then the Slow spell would limit their counterattacks.
[If it seems like the creatures will all die quickly even if Darian does nothing, then magic missile one of the maggot men, preferably the most injured. 5d4+5 force, SR +12.
If the creatures seem tough and dangerous, then Darian casts slow. Target all the maggot men. Will DC 22, 24 if evil, SR +12, -2 AC, melee attack/damage, reflex, partial actions only, 10 rounds]