Ah, I see. In any case, I know I already voted, but I think Akechi wins 7/10 matches, just due to having multiple wincons to Magna's 1, that being Heaven's gate. And the pretty huge gap in stats. Sure, if Akechi switches to Loki, he's gonna get sucked in, as well as the rise in AP that closes the AP gap, but similar to the RH wincon, how soon does BFR happen before Loki nukes Magna out of existence? And he would get nuked, since only Magna's AP and Hax Potency rises. Not his speed/durability.
I don't believe that Magna's offensive info manip will work because Akechi resists status effects which can affect robots with no mind or soul, therefore status ailment resist likely = info manip resist.
Time stop doesn't work because both Personas and Persona users both resist it, but probably not Heaven's Gate. So, what would happen in this scenario is that Magna tries time stop for as easy win, Akechi and Loki resist it, and then Magna dies in any of ways.
Time destruction WOULD be a good wincon, except for one thing: afaik, Magna doesn't exist outside of time, and time destruction sounds like a time nuke, so TD would lead to an inconclusive match. Not that Magna would use it anyways, since it defeats the purpose of letting the P-Thieves pass, and Magna doesn't seem like the kind of person to nuke everything just to kill one person.