I agree with the class choice, but I think that Master Summoner will work out better for PvP. Try to find out what alignments your opponents are, and be true neutral. Drop 1d3+1 celestial/fiendish/chaotic/resolute tigers, giant scorpions, or rhinoceri on them every turn via your Spell-Like... oh, and you can have multiples active due to archetype as long as the Eidolon isn't out.
You get Augment Summoning automatically at 2nd level in this archetype, grab Superior at level 3 and make sure to max your initiative as soon as you can. CHA just has to be 14 or higher. Divert the two allowed points of Aspect from the eidolon then ignore the fact that it exists... or better yet, start with it out and give it an intimidating form, have it charge suicidally on the opener to give you a turn. Once it drops, again, you get repeatable Summon Monster 5 until you get almost enough template tigers to go into swarm rules (7 casts if you just take 14 CHA, which given 20 point-buy will likely happen).