1 party Pink Bean party (No finish of course)

By that logic i could go zak with a HB, SE, SI etc mule and call it a solo while it's clearly not a solo since i didnt show that i was able to do it myself.
I agree with the other guy, solo=100% alone.

Edit: By that logic i could actually bring several attackers with me, as long as they're my mules and i'm pressing the buttons.

You only have two hands, bro. If you have your own perks that other people don't possess that you earned yourself then by all means, you have the right to use them.