If you want to get more energy from stuff, try Skull of Dire Ahamkara, Embrace the Void, Soul Rip, and an gun with Army of One. Using this, this happens:
Your melee charges your grenade and super
Your grenade charges itself and your super
Your super charges your grenade
Your gun charges your grenade and Melee
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Interesting, well put together! I can't say I've ever experimented with set ups like that, but I can see its benefits :D