RULES TO GET V2: DON'T GET DAMAGE FROM UNIMPEACHABLE DON'T TAKE ANY DAMAGE FROM VOID DUMMY USE FIST OF FURY WHEN YOU FIGHTING THE WANGLER HEAL 3 TREES AND HEAL THE DEAD TREES WITH TERRAIN BLESSINGS
so you need to get bomber with some mastery and arsenal, first place down a bomber next to the tree, upgrade it to lv 3 then just spam lv 3 arsenal, you can beat it easily