Doing something similar with an AR/Time Blaster. Lvling through story arcs both red/blue at the same time-no double XP. Once I realized it was damn near impossible to nail every story arc simultaneously, shutting my XP on and off and such I decided to just nail all the badges associated with my lvl range. As far as Blasters go the real challenge was getting thru 15-20 arcs, endurance issues are near unbearable. Recovery serum and inner inspiration are life savers. Make sure you reject small inspirations and it will only drop better ones,when you punch it. Currently 23 about to oro my way through Goldside arcs I skipped, I want those sweet resistance titles unlocked. Good luck though, id highly recommend a blaster to do it with.