Quote (Dominate @ Mar 10 2016 12:48pm)
Get them to slam through all your missions with you, we got our buddy from level 3 to 13 in like 2 hours
This. Jumped from 10-16 in 2 hours and then from 16-19 in another 2. 16-19 only took longer because one of the guys insisted on doing a mission on hard with me at 16, one guy at 18 and the other two at 24. Swarms of purple/yellow enemies all lvl 24, we ended up getting shitstomped on a timed part and called it quits after about an hour. Really though, it was about 3 hours of actual gameplay for 10-19. Everything scales with higher lvl players, so you'll be useless, but you'll get xp regardless. Just hide and let them kill everything.