I feel as if I am butting my head up against a brick wall. I am trying to build an Eidolon-Focused Unchained Summoner Construct Caller with the extra evolution points granted from the Half-Elf FCB and maybe a Extra Evolution feat or two if need be
The Eidolon has a lot of restrictions (No Claws, for example), but I have what I consider a fantastic image and aesthetic that works for the archetype and subtype and am desperate to make it work.
How would you build a Construct Caller Inevitable Eidolon?
At a glance:
1) A lot of save boosts, which upgrade to immunities later. Encourages melee, but you still have to invest into offense.
2) A boost of 20 bonus HP due to size, right at level 1, wow. No bonus from Con, though, which encourages to make it Large and Huge as soon as possible. AC and miss chance help to keep it alive. Personally I'd pick up fast healing 1 right at level 11, but that's my preference.
3) Reflex is a weak save (biped, incentive to build Str based due to lack of offensive evolutions, no immunities vs. effects that grant Reflex saves). I'd consider fire immunity, at least. Spell resistance should help a lot, too.
4) Appearantly you are stuck with slam attacks until level 5 (when wing buffets become available), unless you want to deal with manufactured weapons. Slam's 1d8 profits a tad more from size increases and Improved Damage than the 1d6 or 1d4 of the other natural attacks. So your standard action attack becomes more viable, especially with reach and pull / push. Meaning you can probably get away with using far less than the maximum of attacks per round, and move around the battlefield more often.
I put together this google sheet to try help calculate the Inevitable Eidolon through the levels.
With Huge and Fast Healing, and taking the Extra Evolution feat, I can get 5 slam attacks and be done with it.
I would love perfect flying but I think that is too much of a stretch