Any pot or plate in the room (although all the ones in the large gold rooms by the entrance are destroyed when the two ships are destroyed before DPS.) I only mentioned the ones up by Ca'uor specifically because they're easy to reach before DPS starts provided you're trading the balls up by the back window. The weapon buff lasts until you get a weapon kill, then you get the melee damage buff, and that lasts until you get a melee kill, and so on and so forth. Melee kills reload your weapon and weapon kills recharge your melee.

You can use any of those you can break with one Melee and the Buff lasts until you get a Weapon kill that's why it's insane for damage because it counts for every shot until the Boss dies