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.
Thanos: The Infinity Ending Vol 1 #1 is generally considered non-canonical to the main continuity of the Marvel Universe. non-canon trilogy by Jim Starlin exploring alternate versions of Thanos. The Infinity Siblings, Conflict, and Ending storyline written by Jim Starlin takes place on Earth-TRN803 and Earth-81488, not Earth-616 (the main Marvel continuity).While events from this storyline are referenced in the stories of characters like TOAA and Thanos (Earth-81488), they are not part of the primary Earth-616 timeline.
Eru Ilúvatar As the creator, monotheistic god of Eä aka the universe... transcend all dualism of death and life in fact he completely Trascending and infinitely greater than totality creation... Eru Iluvatar created everything from nothing through his thought He brought into being the Ainur, near-omnipotent beings and a race and elevated them from nothing, Ainulindalë /Music of the Ainur which describes the creation myth, is just a pale reflection as told within the confines of Eä or (The Universe) but Eru's true act of creation is beyond definitions and cannot be fully understood...
secret Fire of creation that was sent to Arda is only a vestige and shadow of Eru's Flame Imperishable He exists on a plane completely removed from anything within the Tolkien mythology. Eru's will and thought completely overrides anything that occurs. Even Melkor's corruption was allowed because it was part of Eru's plan.
so it can be said that this is an easy win for eru illuvatar.