It has Army of One, Injection Mold, and Hidden Hand. I'd have to sacrifice my Harrowed Doom of Chelsis (with eye of the storm) and of course it wouldn't upgrade it all the way, but it would most likely go from 310 to 318, which is still enough to (barely) keep my character at 318 overall light.
I'm having trouble deciding since I prefer pulse rifles and Reflection Sum just feels really good to use, but the Doom of Chelsis is also a very good Scout and I don't know if I'll ever get another at 320.
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Hawksaw/PDX better than Sum anyway. I'd hold out for good roll on those two if you love pulse rifles
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It will go to 316 , and sure you will get another 320 primary , jus not till next oryx challenge