What class head is your creature using? A couple people playing mage/summoner type builds like the warrior head for its Fatality skill, but I found it was much more effective with a mage head (with my warrior and ranger characters), and it didn't move around as much, so could make a better shield (and didn't run off attracting the attention of more opponents in large areas).
Do you know Charm? That would fit with a summoner type playstyle, giving you an extra ally for a time. You don't get full experience from an opponent that you charm if it wears of any you (or your creature/summon) kill it, but that isn't an issue if you charm summoned opponents (they don't give experience anyway), and the extra help in combat more than makes up for possibly levelling a tiny bit slower.
