I feel he should have maybe...swapped to the ones that resisted early on there...
He may or may not have thought he had that covered with Heatran (depending on whether or not he realized Kartana had Sacred Sword) and he probably thought I had a Steel STAB for Jumbao (Grass/Fairy). I still have no idea why he wouldn't have gone for Tomohawk though.
And fun fact, if Jumbao had somehow managed to beat Kartana, literally every one of my other remaining mons had a SE STAB against it. (Tomohawk had Hurricane, Syclant had Ice Beam, Crucibelle had Gunk Shot, and Plasmanta had Sludge Bomb)
Also, Mega Sceptile and Mega Slowbro have been quickbanned from RU if you were considering using them in the tournament.