Mantra of Recall

Acquisition
Signet of Capture:
 * Facet of Chaos (The Dragon's Lair)
 * Featherclaw (Snake Dance)

Energy gain
This presumes Mantra of Recall is cast as often as possible (activation + recharge time) before any activation/recharge time modifiers in conjunction with ending prematurely.

Related skills

 * Offering of Blood (Elite)
 * Energy Boon (Elite)
 * Ether Prodigy (Elite)
 * Second Wind (Elite)