Once Aroda was in position, gripping a firing device in one hand, and the grip of a magitech minigun in the other, she was waiting anxiously with bated breath for the approach of the banditos. Her fingers tapped lightly against the trigger in her hand, her robo-grip flexing in anticipation of letting it rip...
Hearing the bandits just outside, she visibly perked up - her tension rising as she focused her ears as much as she could, waiting for her sign that it was time without being able to see their entrance...
And as the orc entered, leading the pack, Aroda's eyes widened a bit. It was just what she was waiting for - and she could tell from those heavy footfalls against the floor that it was the orc. Perfect...the biggest target! Aroda squeezes the trigger with force, the motion made incredibly easy by her mechanical hands, and there's a loud, noticeable
click. Within a fraction of a second, the devices activate.
The magia's lovely art project, which she had constructed similarly to a claymore mine, blasted its front cover off and sent dozens of projectiles hurtling directly at the space in front of the entranceway. The projectiles, large probes designed to puncture or at least stick to enemies, also trailed thick cords - and most of them struck the orc squarely center mass, with some stray ones lodging onto his limbs, and one errant pair of probes finding his face. Of course, these probes weren't lethal themselves, as they didn't penetrate very far into whatever they struck. But they, and the cables they trailed, were excellent at conducting electricity! Like a claymore taser...if tasers were channeling magical lightning bolts.
All at once, as soon as they make contact, bright streaks of electricity run down the cables and straight into the unfortunate orc, creating quite the light show. Of course, before any of the ones outside have time to enjoy it, the welcome mat Aroda had laid out activates as well, sending out a concentrated blast of electricity over about a ten foot radius, catching the poor souls that followed behind the orc, and even the ones who trailed a bit further away.
As soon as she heard the blasts, Aroda dropped the firing device and rose up behind her cover, grabbing up her gun and getting the barrels spinning...

"TSPD, get down on the ground!"
She yells with as much force as she can, just as she's actually taking in the scene. Surprisingly, the orc hasn't gone down by the time she popped out, still standing stock still as he gets pretty much electrocuted. Two of the ones outside were on the ground, sparks crawling over them as they twitched, and the last one - the one who had some magitech of his own - was still up, supporting himself against one of the partially destroyed walls littering this place.
But with the big orc guy still standing paralyzed in the doorway, she couldn't exactly get a shot on him...

"Aw, dammit...!"
She dives back behind cover to start fiddling with the trigger again, which after a few moments, does have a visible effect - the electric current flowing into the orc overloads, causing a crackling burst that blasts him to the side before the electricity stops completely. Though with how tough the guy looked, Aroda wasn't really sure if that'd put him down for the count...
@Hanno Futaba