For a Kid Icarus Assist Trophy I will accept nothing less than the Eggplant Wizard.
Nothing.
Less.
Just Assist Trophy potential perfection. If we end up getting more than one AT for most series then the Reaper and Reapettes as the second.
I'd rather not Magnus be an Assist Trophy because there are seriously enough Assist Trophies already that consist of characters running around attacking the others and I seriously can't think of anything else Magnus could even do.
If I were put in charge of Kid Icarus representation:
Playable Characters: Pit, Palutena
Stage: The Underworld
Assist Trophies: Eggplant Wizard, Reaper & Reapettes
Boss: Medusa
Extra Characters to appear in Pit and Palutena's Smash Taunts: Viridi, Hades
Palette Swap: Dark Pit
Done. At least, that's what I would do. Palutena could have some colors based on different female characters from Uprising like in this
picture. Maybe Hades could appear in the background of the Underworld stage occasionally, or maybe have Medusa do that and him be the boss (I'd prefer Medusa as the boss though).
Enemies in Adventure mode could be Shemum, Monoeye, Reaper & Reapettes, and Eggplant Wizard (like how the Hammer Bro appears both as an enemy and as an AT).
The rest of the people could be left to Trophies.