yea i found that much of my summons/etc dont' do much in battles, just stand there, don't attack, are just meat shields. Maybe its the number summoned, not sure. I went into the final battle summoning a bunch of stuff around the final boss, 3 large spiders, enchanted cleric swords, and they really did nothing excpept just draw fire for a while, which is still good, but i would have really liked everything to actually fight and do stuff.
Testing stuff, found summoned elementals did fine, but had trouble with animated dead, cleric spell swords, monster summons.