The Sisters are much better fighters and soldiers, having the combination of extensive combat knowledge and military training directly inputted into their brains plus the experiences gained fighting Accelerator. See SS2 Chapter 20, when the Sisters scattered over the world coordinate around 50 infiltration/hostage rescue missions all over the planet to save the kidnapped Gemstones, defeating all defenses of secret government facilities, including things like individual Sisters soloing tanks, attack helicopters and proffesional assassins without losing a single Sister in the process. Not to mention being skilled enough in stealth that when the Science Guardians declared their intentions of going against AC all the Sisters in their care were able to escape and disappear despite the presumably AC-issued equipment the Science Guardians had (outdated equipment compared to the actual city's, sure, but they still had things like powered suits). And the Sisters outside AC were likely to lack most of their AC equipment, which they should have here. The Misaka Network makes urban warfare like this pretty hard for the Stormtroopers. If any Misaka sees Stormtroopers all the others will know where they are and they'll also learn any info that any of the members gathers, including any possible weaknesses, so they'll react and adapt much faster than the Stormtroopers.
Really, the electricity is just a bonus to take out any Stormtrooper that gets too close. They will do just fine without it.
The Stormtroopers might have a stronger main gun, but the advantage is kind of moot given regular firearms would kill the Sisters just fine. And while the Stormtroopers aim is kind of akward most of the time, the Sisters are decent shots and have aimbots on their Toy Soldiers.
The only other advantage Stormtroppers have is their armor, and even if the armor is good enough to stop a rifle bullet from penetrating the Stormtrooper is still going to feel the impact, so just shoot a few more at the same spot to break bones or to knock them out. Or aim at the obvious gaps in the armor. Both are things the Sisters will quickly realize and, again, anything a Sister learns is transmited through the Network so all gain that knowledge instantly. Plus a sizeable amount of Sisters are likely going to carry Metal Eaters, and those will easily blast through several stormtroopers or any cover they try to use.
@Jasonsith
Accelerator has nothing to do with the Misaka Network's ability to transmit information.
