Quickest way to level up right now?

there's one solo in the MUT Heroes or All-Rookie, I forget which one, but when I do it, it gives me like 120-300 xp. not sure if that's only for the first few times and then it lessens but right now it's the one I'm doing. It's one of the passing ones, so all of the objectives are easy to do.

I am doing Larry Fitz first NFL Epic solo since I need to catch up also and I want to get my points, passing yards, and passing TDs for career stats and MUT Heroes