OptionalPairing healing tempo with items like Radiant Regen and Merc Mag can always keep it up, pair it with spirit snatch aswell to proc Radiant Regen. If possible, get transcendant cooldown to really have more uptime on Merc Mag and your Rend, then get your usual gun items like Burst Fire, Hunter's Aura, Fleetfoot and Vamp Burst to always have ammo. Then you get your necessary greens. (P.S. I have not tried this, I just came up with it cus it sounded funny)2 items