Do summoned creatures reduce the experience earned by individual party members? In Neverwinter Nights, when you summoned a monster, that monster would take a share of the XP from fights (which is why I never used them).
"Even the most powerful wizards will respect cold steel once it's shoved down their throats."
Eer... we need Silverdragon to answer this correctly (he's the number guy ), but I think in IWD2 summons won't reduce the XP you get for killing a monster.