Scott: Nope! Do you ask because of the cookies?
Hmm, i don't think changelings can work with warshapers. Here is why: [sblock]
Minor Change Shape (Su): Changelings have the super natural ability to alter their appearance as though using a
disguise self spell that affects their bodies but not their possessions. This ability is not an illusory effect, but a minor physical alteration of a changeling’s facial features, skin color and texture, and size, within the limits described for the spell. A changeling can use this ability at will, and the alteration lasts until she changes shape again. A changeling reverts to her natural form when killed.
A true seeing spell reveals her natural form. When using this ability to create a disguise, a changeling receives a +10 circumstance bonus on Disguise checks. Using this ability is a full-round action.[/sblock]
Disguise Self is very different to
Polymorph and the spells of this line. It seems to me that the Changelings were designed to get a small boost with a free level 1 spell, sot of like the Drow and their Fairy Fire. It was not intended to be a shapechanging ability to the extent of allowing you to become a Dragon for example. The differences between the two spells are apparent, and the SU ability that shapechangers get can be countered by True Sight, therefore it is not "real" shape changing. Looking at a Werewolf with True Sight will not make him any less snarling and long-teethed. Get my point?
Let's review the requirements for Warshaper: [sblock] - Change shape supernatural ability
- Shapechanger subtype: lycantrhopes, phasms
- Polymorph as a spell-like ability
- Able to cast the Polymorph spell
- Wild shape or similar class feature[/sblock]
(Shapechanger Subtype: Changelings are humanoids with the shapechanger subtype.) Apparently this should work, but the subtype is too big of a generalization. A changeling is not a lycantrhope or a phasm. Last but not least, Flashmorph/Multimorph are dependent on the parent ability - unlimited changes within the duration for spells, and move-action changes for unlimited duration abilities like wild shape. The restrictions cannot be applied to the Changeling's SU ability, since it functions like an unlimited spell and would theoretically get the best of both worlds (IF it was an actual shapechanging abiliry, not one countered by True Sight)
I will have to do some more research, but in one of the games i play here, CM had a Lythari character - Elves that can become willingly infected with lycanthropy. I will have to look the specifics up, it's from the Forgotten Realms books. Maybe that is the answer to your needs? Let me get on this tomorow as i need sleep now