Some observational items. This chest piece is for sunsinger warlocks looking to get an extra orb of doom. Other perks are useful as well. I've tested a few combos and here's what I found out: -starfire protocol unlock does not work with other nades equipped. -starfire protocol unlock does not stack with gift of the Sun talent (extra nades on sunsinger). -You can use touch of flame or Angel of light talents with the starfire protocol unlock to essentially get an extra node in the build if you run with fusion grenades. Not sure if the 2 nade limit was intended but I like the chest piece nonetheless. I still think heart of praxic fire would still be the better sunsinger chest piece.