M M 178's page

It doesn't really seem a fair criticism that something is "too much of a glass cannon" in a DPR contest. If it takes Improved Natural Armor for that spare feat it has 22 AC and ~ 76 HP on average. Everything I included seems to be legitimate according to the rules as written. If I've missed something that contradicts this feel free to point it out.

As I wrote it, given that it'd hit on everything but a 1 using power attack, average damage for 1 claw attack is 28.35, making this Eidolon have:

283.5 DPR.

Even in the weakest version you presented it still has it beating anything else so far by a fair margin. And again, this still isn't including the summoner himself.

I'm curious if giving up the claws, taking the enhanced ability evolution and extra limbs and picking a weapon feat would yield higher damage.

Thought I'd throw up this Eidolon build for a level 10 summoner.

Biped base form.

Large (3)
Imp damage claws (1)
3x limbs (arms) (6)
4x claws (4)

It starts with Limbs (arms), Limbs (legs), and claws. I guess this one has to be really clever to use all of its attack, but as far as I can tell there's nothing wrong with putting claw attacks on its legs.

For:
30 Str (32 with Ioun Stone)
14 Dex
17 Con
7 Int
10 Wis
11 Cha

Multiattack (free feat)
Weapon Focus (claws)
Improved nat attack (claws)
Improved crit (claws)
Power attack
Some other feat

Amulet of Mighty Fists +3
Pale Blue Ioun Stone (+2 str)

And Heroism cast on it (10 min/level, +2 to attack).

Yields:

10x claw: +26 (19-20 x2) 2d6 + 14
power attack 10x claw: +23 (19-20 x2) 2d6 + 20

I'm not sure how to work the calculator but that should yield >200 DPR. Someone care to run it for me?

Also, this doesn't include anything for the summoner/the inevitable swarm of summons that accompany it.