Good news about update(JUST DOOO IT) kappaI asked Jubisman/Xzjv about this, waiting to hear back from Xz since he apparently coded it.
Use invoker set, craft the base gear with cube, or have garbage gear and let bot gear for you at lower Grift levels.
No file changes recently, but I will probably be doing a huge update today. I found something super efficient.
Also, Sunkeeper is better actually because 30% damage to elites stacks multiplicatively with other damage % increases like physical and bombardment %. Here is the mathematical proof:
100 * 1.30 (elite) * 1.60 (physical) * 1.30 (bombardment) = 270.4
100 * 1.80 (physical) * 1.30 (bombardment) = 234