I don't understand the teleporting > superspeed argument.
Apocalypse isn't going to even be capable of processing a necessary teleport when he needs to do so because he's incalculably slower in cognitive ability. Flash will literally have scrambled Apocalypse into mush before he can recognize that Wally has MOVED.
And even if I throw in a handicap and say, I don't know, let Apocalypse teleport the very INSTANT of round start, there isn't a place anywhere in Wally's radius that he could appear and strike before Wally could react and counter. There isn't a place he could flee to in the immediate vicinity that Wally couldn't bumrush into blue pastry before Apocalypse could even register his own surroundings upon arrival.