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.
(As long as Asgard is there)(I don't mean the battle to take place in asgard but just that Asgard is present somewhere)
Apocalyypse in raw power is far above Hela that's for sure. Pyramid building, turning whole Cairo to dust to form pyramid on molecular level, amping Charles's telepathy to planetary level, causing global Earthquake by awakening and making Storm super powerhouse (able to even desintegrate his force field/teleport bubble)