[3.P] The Summoner's Handbook: A Guide to the Pathfinder Summoner

[Morien]

Eidolon HD doesn't advance at the same rate the Summoner does. At 20th, it has 15 HD, so it doesn't get an ability increase any more than anyone else would. The table delineates when it gets ability increases, when its divisible by 4, like every other creature.

Thanks, I got caught up in looking at just the levels and didn't look at HD. It makes sense now.

Looking at a Lillend type Eidolon, but without the magic. Going for max natural attacks and one 2-Handed Weapon attack. Suggestions for builds/feats?