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.
Number 2, electro wouldn't even know he was facing drones. He would be stuck in an illusion of an infinite abyss of nothingness while getting hit by millions of propulsion blasts from all areas and he wouldn't even know what was hitting him. He would think he was fighting mysterio but it would just be a hologram and would therefore be distracted as he would try shocking him. Mysterio is way smarter than electro as he created the glasses in the first place but had the credit stolen from him by Tony. His ability to manipulate, distract, confuse, mentally torture, and disassemble someone's mental capabilities would easily win him the fight. Everything is an illusion with mysterio. He might not even be dead. His death could've been an illusion. The entire no way home movie could be an illusion for all we know. (Obviously it won't be, but it could.) The drones make mysterio the most powerful spiderman villain we have seen on the big screen up to date. The drones are capable of leveling cities within minutes and nobody would know it was even the drones. Mysterio is just too untouchable.