Classic: Picking mp5 belt for shadow

AMR is giving me as BiB Girdle of Prophecy

over Sash of Whispered Secrets. I cannot see any situation where this is true. Is it a bug? Is it properly measuring +shadow spells for Spriest?

Make sure you have it set to use mana potions/dark runes, and possibly shorten fight duration if necessary based on what your guild clears. It’s likely valuing that due to the stats and mp5 since if you go oom you do no damage.

Thank you, that was the problem.

Yeah, we do factor in your mana pool, since running out of mana was a big problem for DPS in classic.