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.
Barbara Gordon trained the Robins and was also responsible for training characters like Spoiler and Cassandra Cain. So she has this in experience
she has beaten Nightwing before and even Black Canary and Huntress on a few occasions. Barbara is arguably even smarter then Bats Overall she is to good of a tactician for Selina Selina has some great feats like beating Tim Drake soloing some of Batman his rogue gallery and holding her own in a sword fight against Talia but Batgirl is just to skilled for her.