I was more wondering if the efficency nodes in WB are needed if you get the 25 Attunment or really at all is you have the crit since Swipe is going to be refunding mana.
I took efficiency nodes (Ursine Wisdom and one before it) for Roar, since it gets +20 manacost from Woodland Bear node. Charge also has +10 manacost node, but I didn’t use it, because it seems to be bugged.
For Swipe you only need 25 attunement and no mana efficiency nodes.
Ok that is more or less what I was thinking.