If the high plane is willing to actually fight. Then stay and fight.
Too often the high guy comes. Hangs out. Picking. They go for the BnZ pass and when they lose the advantage start running away to extend and come back when they have the alt again.
But if the high plane comes down and wants to dance, I stick around. If they refuse to engage in any other way than from above, to heck with that. Not going to feed kills.
Always depends guess.