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.
She-Ra (MotU) is based upon Asherah, who according to ancient mythology is the "Queen of Heaven" and the wife of El. Together they are said to rule the universe as One. This is the reason why She-Ra is said to be the most powerful woman in the universe, very rarely loses a fight (in canon), is able to magically transform objects using her sword and can counter the magic of others.
Consequently, it is possible that the Living Tribunal will realise that he is facing his boss (in an unfamiliar form) and with his wisdom decide it is prudent to lose the battle!