Forgot about the struggle...

[eisley]

at 60, iksars/trolls regen 12 hp per tick standing, while other races regen 4 per tick. (18 vs 7 sitting) in other words, +8 while standing, +11 while sitting.

and the regen on the troll illusion doesn't scale or have anything to do with passve troll regen. it's simply a 1 hp regen per tick affixed to the actual spell:

1 : Illusion: 9 (Troll)
4 : Increase Hitpoints by 1 per tick