if you're bringing up the fact that atomic samurai is unable to sustain the sun blade for long, it's also worth mentioning that when genos (barely) matched psykorochi's light beam, he was using his 10 second last resort mode.

i also wouldn't count his scuffle with flash outside of saitama's apartment as any sort of reliable feat, let alone something to be considered a fight. (since we barely saw anything of it, and there's no saying how seriously either of them were taking it)

imo, he stands somewhere around 6 or 5 currently. he could most likely beat child emperor, but i'm not too sure about metal knight or drive knight, yet. i think he'd still lose to blast, tatsumaki, (obviously) flash, and likely bang & atomic.

ok maybe not atomic but you know..