Eidolon flanker - Help!

[Kryzbyn]

Heyas all!
Since you all helped out so much on my Druid/barbarian idea, I come before you again asking for guidance.
I'm making a gestalt Inquisitor/Summoner 5th level. He is godless, operating as an agent of the powers of good in general, actively proctecting the masses vs a growing evil, ruthlessly. He is a half-elf, uses a Elven Curveblade and a Composite longbow. His eidolon (fluff wise) is a manifestation of the souls of various Azata that have fallen in battle vs evil that he calls forth to aid him in battle.
His purpose in game is to act as a flanker and DPS pet, for the inquis to use for his solo-tactics teamwork feats.

I'd like help on building the Eidolon. Due to it's nature as former Azata, I'd like to stick with a bi-pedal form, and no extra arms please.

Actually, any ideas for this combo would be welcomed as well.

[Dragonborn3]

The reach evolution would probably a good idea, in case it can't always get within 5ft.

Acrobatics should be a class skill so he can get into flanking more often, and the Skilled Evolution will almost ensure he gets where you want him.

[KilroySummoner]

Boon Companion feat is a must for any multi-classed summoner

[Kryzbyn]

KilroySummoner wrote:

Boon Companion feat is a must for any multi-classed summoner

I dunno...an Eidolon is neither a familiar nor an animal companion.

I don't think that feat would fit.
Besides, this is a gestalt character, so I don't have to worry bout CL loss :)