Mantra of Recall

Acquisition
Signet of Capture:
 * Prophecies
 * Facet of Chaos (The Dragon's Lair)
 * Featherclaw (Snake Dance)
 * Eye of the North
 * Facet of Illusions (Magus Stones during The Cipher of Lyssa) and (Varajar Fells during The Path to Revelations)

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 articles

 * Effect on end skills quick reference
 * Enchantment spell skills quick reference
 * Gain/Lose energy skills quick reference