Dead Island 2 XP Farm
Get to this mission here in the Sola DLC. Kill all the zombies out on the sand (off the stage). If they stop spawning, run out of bounds and wait for timer to count down. After that, restart the mission and repeat. Run out of bounds when you need a break or need to go to workbench to repair your weapons. The workbench is on the stage, behind in one of the corners. Zombies are regular ones so, you don't have to worry about dying too much or at all. It's a bit of a grind but, it works. Have Fun!
Music by and credit to: Apashe - Majesty