Pretty sure you can only get some way into 36 before you stop getting XP or something
Apparently lvl 37 is impossible but lvl 36 is definitely achievable (Kesh has retired at lvl 36, go on cRPG site click on the tavern tab and look at the hall of fame. Also their are a hand full of other players at this level who have not retired)
Lvl37? Really? I'm Gen20 and retired on lvl32 several times of these gens but always between 31 and 32 it starts to get boring. I could probably go up to 33 if I wanted a title but 37? Fuckin insane
Leveling to 33 is very easy if you participate in strat battles.. other wise it would take far too much grinding (at least for me).
Personally I only really use my main on strat and try to keep it a high level (between 30 and 34).. Then use alts for other game modes so I can play different classes and enjoy leveling up (between levels 18 and 27 it's quite fun for all classes)