demiurge1138
Inventor of Super-Toast
The ability scores are right, give them ordinary hold person (none of this mass stuff), unarmed strikes like a monk and Stunning Fist.
Revising...
Feign Death (Su): A tabur can place itself in a cataleptic state that is nearly impossible to distinguish from death. Although able to smell, hear, and know what is going on, the tabur is blind and has no sense of touch or pain. Its breathing is slowed to the point of being undetectable.
A creature examining the tabur may attempt a Heal check opposed by the tabur's Disguise check to detect the ruse. The tabur gains a +10 racial bonus on Disguise checks to feign death.
Invisibility doesn't actually give a +20 bonus to Hide, though, if I'm reading the rules correctly, only effectively by making it hard to Spot -- no Hide check needed, it's a flat DC.
So a +10 bonus gives an average Disguise check of 20 with no ranks or Cha bonus. That's the same as the easiest Spot check to notice an invisible creature is around. So we need to ask ourselves if that's what we want, or do we want the DC to be closer to an invisible creature holding still (DC 30). And we can adjust ranks, add another racial bonus to Disguise, etc.
As for the type of bonus, I think Shade is saying that taburs are racially good at feigning death, not that the Su ability is improving their ability to Disguise themselves. But I could really see any of these bonus types.