Have you checked the spells available for Summoners? Grease, Glitterdust, Black Tentacles, Hold Monster, the "pit" spells. They make really good GODs while the eidolon and random summons go smack the party around. Just give a few charging feats to the eidolon (PA, Leap attack, Battle Jump, Storm Trooper, Rampage(PF) etc.). You can also try to escape when things go south with Marionette Possessing your eidolon and grabbing your body while flying away.
-Uncle Has