Eidolon - stacking damage increases?

[Midnight_Angel]

The 1 point evolution Improved Damage makes a natural attack of the Eidolon inflict damage as if one category larger.

Now, the Eidolon can easily take the Feat Improved Natural Attack... which will cause one of its attacks to inflict additional damage, as posted in a list which is slightly different to the usual size increase table.

Prize question: An Eidolon possessing both Improved Damage and Improved Natural Attack on the same natural weapon will get... what exactly?

[Nightskies]

Size it up once. Then size it up from that size up. A d4 becomes d8. A d6 becomes 2d6. Improved Damage says it doesn't stack, but that's with regard to itself when selected multiple times. Both are untyped bonuses.

Bonus:

Bonuses are numerical values that are added to checks and statistical scores. Most bonuses have a type, and as a general rule, bonuses of the same type are not cumulative (do not “stack”)—only the greater bonus granted applies.

The important aspect of bonus types is that two bonuses of the same type don't generally stack. With the exception of dodge bonuses, most circumstance bonuses, and racial bonuses, only the better bonus of a given type works. Bonuses without a type always stack, unless they are from the same source.

Improved Damage:

One of the eidolon’s natural attacks is particularly deadly. Select one natural attack form and increase the damage die type by one step. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack.

Improved Natural Attack:

Attacks made by one of this creature's natural attacks leave vicious wounds.

Prerequisite: Natural weapon, base attack bonus +4.

Benefit: Choose one of the creature's natural attack forms (not an unarmed strike). The damage for this natural attack increases by one step on the following list, as if the creature's size had increased by one category. Damage dice increase as follows: 1d2, 1d3, 1d4, 1d6, 1d8, 2d6, 3d6, 4d6, 6d6, 8d6, 12d6.

A weapon or attack that deals 1d10 points of damage increases as follows: 1d10, 2d8, 3d8, 4d8, 6d8, 8d8, 12d8.

Special: This feat can be taken multiple times. Each time it is taken, it applies to a different natural attack.

[Weirdo]

Two damage dice increases.

Not sure which order to apply them in the event that you go over 2d6 where they start to differ.

[Karal mithrilaxe]

Monster Feats
Most of the following feats apply specifically to monsters, although some player characters might qualify for them

This is the total number of feats possessed by an animal companion. Animal companions should select their feats from those listed under Animal Feats.

druid animal companions can take monster feats----eidelons take their feats like characters---ie none frmm the bestiary

[Michael Sayre]

Karal mithrilaxe wrote:

Monster Feats

Most of the following feats apply specifically to monsters, although some player characters might qualify for them

This is the total number of feats possessed by an animal companion. Animal companions should select their feats from those listed under Animal Feats.

druid animal companions can take monster feats----eidelons take their feats like characters---ie none frmm the bestiary

Feats: This is the total number of feats possessed by an eidolon. Eidolons can select any feat that they qualify for, but they must possess the appropriate appendages to use some feats.

Your own quote from the Bestiary notes that Players can qualify for monster feats. An Eidolon qualifies for Improved Natural Attack. There's nothing that says otherwise.