Actually, yak, your description is slightly flawed, but I think it's just due to typo. What you are saying is that you have to apply to the
2+ save set first, because it is majority. This could be any four hits (probably the AP5 hits). Then two hits would go to the 3+ save set (probably one normal save on the Priest, and an AP1 hit. At this point, 6 hits have been applied. Then it's back to the 2+ save set (at this point, 3 AP1 hits probably have to be assigned to this set). Then one more normal hit on the Priest, and the last
AP 1 hit on the power armor guy. Then the last wound would go on the Terminators.
So in all, the Terminators have to take 3 AP1 hits, the power armor guy could absorb 2, and the Priest would conceivably avoid taking any at all.
Makes total sense. And here's the wrinkle:
You assign the wounds to "sets," not individual models. So the three AP1 hits cannot all be assigned to one guy. They have to be assigned to "the Terminators," and casualties taken as such.
We *almost* played it right.
(Side question: Can a Runic Charm allow you to reroll an invulnerable save? I've always played no, but it came up.)