Integrated Nodes is actually based on Improved Binding, not Favored Vestige; the CL for the effects doesn't change, just the ones you can qualify for, like you can qualify for better vestiges with I.B.
Rapid Recovery is a good idea, I'll add something like that. And I'll clarify Int Nodes as well -- the number doesn't change, it's fixed at the time you take the feat. Retraining is allowed, though, if you want to retrain it later to get more nodes.
EDIT: Added Fast Recharge feat.