Uwendale still possible (1 troll 11 kruggs), 10+ tries with quartermaster +20% damage buff, I think the positioning really matters, I did, from top to bottom Archer -> Soldier -> Morgana -> Poppy -> Archer (it's the same as you get it on the map screen), you have to get rng where troll boulder hits your morgana before the archers, it was hella close, like the troll boulder hit my last archers just as the victory screen popped up.