Fastest way to get from 60 to 72?

Just finished all story and side quests again, this time I got to 59. I want to activate mayhem after reaching 72, don't see a point farming for specific gear only to replace it every level or two. I'll jump to dlcs after activating mayhem.

I'm wondering what is the fastest way to grind these 12 lvls. I hate stormblind so that's out. I can do the Mysteriousler questline or maybe do a couple of cartels and bandit/maliwan slaughter to recharge them.

Obviously I'm going to use the XP boost from the arcade machine, got 150k points there, but what activity has the fastest way to close gap?