Another who should I level up post

Hi all, started playing a week or 2 ago bc my 9 year old daughter loves the game and I wanted to connect with her in something she likes. Of course I'm hooked now. I haven't used enough heros to know so im asking who is worth investing in? I blew a bunch of stuff on Nita and I barely use her anymore. What do you guys think?

Also how do the season trophies work ? I've been pushing hard to get a hero to 1000 and unfortunately buzz is the closest but I absolutely hate using that one . He's at 933. But when I go to the trophy room it shows my season trophies at 997?? My next highest brawler has like 750 trophies . Is there another way to get more trophies?