Loot goblins hack
My squad busters always crashes if I try to watch my replays around ~1:50, so this is the only one I could show.
Anyway, every whole minute, loot goblins spawn around the gem mine, and if you have a freeze (preferably a super freeze), you can farm all the goblins. Obviously works best with splash damage troops + trader, and works best at 1:00 as the most goblins spawn at that time. I haven’t seen anyone else do this in my games, so here u go ;)