Also works for Campain.
The 6DU Buffbeam connects both aura stacks.
The yellow arrow shows the maximal rotation of the harpoon. Zoom out when placing the harpoon or a better view.
Hint 1 is next to the rock.
Minions at the Crystals are between the big rocks (for more stability)
I start at W36 and only use a towerboost monk, both for upgrading and boosting.
Stand on the harpoon to be safe from goblincopters and shoot south to generate mana.
Restart your boost when you see not much is going on, so you reduce the risk of running out of towerboost when you would need it.
Add 3 afk chars for the last wave. Combat time in total is 30min for me.