You talking about Power Cooler or Mana Conserver?
Both are nice but require you a slot. If you equip Power Cooler for example, u're not gonna equip loud+loudII+icemaker.
It's a good option for soulsoother (I already use it), but I dunno if that's gonna be enough, even factoring Mana Converter.
Guess we'll see once the update is up, but my feeling is that it might not be enough.