Do Regen, Medica II's, and Asylum's regen effect all stack?

[Tridus]

Also, for 8/24mans, yes, multiple regen effects all stack, with the possible exception of Asylum. (never tested that one)

IIRC Asylum in the same group does stack. I'm not sure if it works for the other two groups in an alliance raid, as there's some stuff that doesn't.