Wow, that gives you a near Explosion-level attack that is 100% accurate and has no recoil or other negative effect. And as you said, Archeos' speed and attack stat make it perhaps the best user of such a combo.
Hmm... perhaps Acrobat against an opponent who you know has nothing left to resist it (or if they do will still take a lot of damage), hopefully netting you one kill. Then Head Smash whatever comes out next, hopefully netting a second kill. Then with your HP now likely over half gone, use Endeavor to weaken the third opponent before going down.
Though of course Head Smash may still be too risky with 80% accuracy.