Ultra was my strongest league in the preseason, (I was running the dynamite team of Moltres: Sky Attack/Overheat, Machamp: Cross Chop/Rock Slide, and Giratina Ancient Power/Dragon Claw. For Season one I didn’t feel as good overall bt I think I had even better results using Lugia, Togekiss, Giratina. My main issue was encountering Articuno leads which could nearly sweep my team with Icy Wind spam. Whenever I used Machamp I got Giratina walled so I just hoped to get lucky.
This season I plan to use Melmetal, Giratina, but I’m unsure about the third. Any suggestions? Ultra was once my best League but I’ve barely paid attention to its meta. Pokémon wise, I find it to be the most diverse of the three.