So I always see guides saying that the Stonetooth stacks better with apples than red katana: what does that mean? And as a level 124 Hero, is there any other fast way of leveling up besides skele leech? Thanks.
Basically 1h swords have a lower damage multiplier than 2h swords. Meaning to say 100wa (from your onyx apple) would increase your range more with a stonetooth than a red katana.
Try out various ToT maps. Might not be a lot better, but the XP will increase over time rather as you improve than staying static.