i've got a problem in my 3.5 game.

i play a summoner. once upon a time, i was half of the party's damage dealing contingent. other half is a extraordinarily well geared fighter. the rest of the party is just support (buffs, heals, interference, etc). now, the fighter keeps getting gear donated from the entire party, and as a result is so butch at the moment that the DM has resorted to having us fight large-or-larger enemies with ACs in the mid 30s just so the fighter can't 1-shot them. this makes my summons nearly useless, so i end up just buffing the fighter or trying to harass enemy casters. i'm a summoner, i've invested in being one. if i wanted to do save-or-fails or buff people, i'd have rolled myself differently.

so, i can summon enormous crap to grapple, but most fights happen in cramped spaces, in the air, etc. also, since we fight large to huge sized stuff, grappling isn't a sure thing. and my smaller summons can't hit worth shit, i can't even hit on the round i summon them when shit is flat-footed, since they have mostly nat-ac and armor.

what do? i'm already specced hard for summoning, with all the expected feats already. how can i raise my summon's potency (besides taking leadership and making a bard).