The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Of course this is nowhere near the maximum to where Asura can be powerscaled conceptually.
Asura is a so-called Great Old One, a God-Like Being.
For example, there's an entire parallel universe (== e.g. it obviously contains stars) inside of Asura, to where people and things he absorbs are warped :
Also, Asura is not only a physical fighter, but also an unkillable abstract concept:
Asura is crazy powerful, especially with his hax , too.