Fighting WW dragons -- worth sacrificing stat gear for resist gear?

[Malrubius]

Hmm. With the CR gear I have, I'd lose 56AC and 210HP, and gain 110 CR (for a fully buffed CR of around 210). Gonna have to experiment to see what's better.

peak HP is largely irrelevant on a class like a shaman.

I could easily be wrong since I haven't played in a while, but I recall (peak)HP>AC>Mana for shammys...or at least peak HP is/was considered extremely relevant?