Grind in the Infinity Trials
Like we just said, there are a lot of heroes in Ultimate Alliance 3, and if you don’t use someone for a while you’ll find them pretty under-leveled. Luckily, the game gives you quite a few opportunities to make up for that.
The primary way of quickly leveling up characters is in Infinity Trials, short challenges that you can take on through a separate menu. These trials add on unique rules and features to make things more difficult or different, like making it so that only abilities cause damage or that your health constantly depletes.
All of these trials are great ways to level up characters, but specifically the Wave trials have you taking down 100-200 enemies. These serve for fantastic experience, especially if you take on a high-level one and couple high-level characters with a lower one.
Additionally, you’ll earn XP cubes from a ton of different Infinity Trials, letting you grant even more experience to your under-leveled heroes.