I use the same equipment set up.
SpotlessMoonlight Hammer +12
SpotlessBrain Scrambler +12
Sage Legacy +7
I dont get it mvp alot, but I do have streaks of mvp. use the 38 hammer crit relic to pile on the damage points on players and xstal. Even if they dont ask, heal your teammates if you have no enemies around you. this way you can get points for kills, xstal damage and healing. even if you dont get mvp you still get alot of points.