My Bulk Up Ceruledge isn't terrible but just doesn't feel good enough. Maybe I take off Psycho Cut and put back Clear Smog to go with Bitter Blade and Reflect, idk.
Phisical attackers in general won't cut it. Even if you get to +6, the boss will get to +6 defense much faster, then wipe your buffs and you tickle.
I have used Ceruledge a couple times, but mine is fully supportive with Reflect (why so few pokemon learn this btw?), Clear Smog, Bitter Blade and Will o Wisp, and honestly I have to fully dedicate myself to spam Clear Smog in order to get anything done.
Anyway after like 6 attempts I think I'm just gonna come back to this later after people get it out of their system. My quick reaction is honestly that if Charizard was too undertuned (mostly fire attacks, easily countered) Cinderace feels a bit overtuned. Better tera type, higher attack, better coverage, a set up move it loves to spam. It honestly feels overwhelming, which I guess is fitting in a vaccuum, but terrible from a "I would like to actually overcome this, please" way.
I think this one is just much harder to "figure on your own" as the error margin is super low.
I have a few friends who are 4manning it and pretty much killing it every time. 2 Armarouge + support or other nukers seem to be the best comp I've seen so far (as long as turn 1 you get psychic terrain + reflect + some kind of atk debuff off) and then one person has to dedicate to buff clearing while everyone else do their things.
The sheer amount of people that (as usual) queue up with level 70 mons or mons weak to fire is however making me sad once more.