Fresh gold and diamond fighters (level 1) sent through new Holodeck Hazards with XP multi. activated (and 70% or 60% longshot) = level 35 gold and level 26 diamond in 5 battles!
If you are lucky, all you need to get the character milestones in the revised PFs is a 27 streak (10mil for gold) and 36+13 streaks (30mil for diamond)
With only 30 skill points separating top 10% and top 11%-30% otherwise identical event rewards, I hope completing the 12M milestone diamond track is enough to land in either range.