Wait. Can you survive getting the mace without doing all that?
You have to destroy every power source crystal when you're in the chamber with the mace. It's doable, but it's incredibly annoying. Not sure whether you can do so before trying to steal the mace. I find it way easier/quicker to just place the correct weapon types (normal weapons will suffice, no need to hunt for the ceremonial ones) on the altars to get the dawnmaster's crest
I ended up destroying all 4 myself, but after the fact I noticed it looked like there was a wall battery that may have powered all of them on the side of the platform you're standing on. I couldn't help but wonder if destroying that would've shut them all off at once.
Good question... I think I destroyed it just for good measure with my first group

But as I hated the look of the weapon, I reloaded an earlier save and just left the bloody thing behind with my first group. My second group did the quest more or less the correct way .