This is my guide on my new favorite farming build for Expeditions - Explosive Trees. The trees kill every enemy other than Drakenlord, and all you need to do is spam em down in front of the enemy spawn and watch them go to work. They however aren't very effective in Onslaught since the enemies deal too much damage.
Update: Trees were nerfed and can no longer effectively kill bosses. Watch my newest video to see what I've changed in my setup - • [OUTDATED] So Trees got nerfed... What now...