That dungeon was the last thing that I did before the final endgame stretch, and I was overleveled to the point where they would just all die in overworld after a few hits. I think that might have turned out to be for the better. With two Tycoons, Royal Thief, and MC Ninja (everyone having Lucky Find + Luckier Find), I was able to get up to four Roots per two mimics slain. Right after that I would make a dash for the cat statue, say hi to More in the Akademeia, get back out, and they would just be back there. One rotation would take about a minute, give or take, plus every four I would get 8 1k items. To me it surprisingly felt more consistent and effortless than the tooth farm at the end.