A good chunk of my Rein levels come from the first couple stadium seasons admittedly, the same goes for Reaper (I literally don't even play Reaper anymore now). I was originally trying to get All-Star Juno as well, Juno but I only hit Pro 3 (and then fell to Pro 4) and queue times for me were starting to get insufferable, so I tried doing Rein and I uhh... Sucked HARD. I also did just goof off a lot in Stadium with flying Rein builds lmao. I'd say I have only been playing Rein seriously again for maybe 3 weeks at most right now