Since this was refloated, I think I'm going to take the chance to rant: Apex does not and cannot work and the reason is not Endless Hunger nor how difficult it is to play Apocalypse but something much more simple: It has no draw, a gimped economy and absolutely no multi-acess.
Like any Runner deck, you need 11-12 economy cards. Your secondary breaker costs money, your Apocalypses, Wastelands and Hunting Grounds are not free and you absolutely need to trash assets like any other Runner. But you cannot run the vast majority of credit-generating cards. You cannot play Armitage Codebusting, Daily Casts or Kati Jones so, ultimately you are forced to play either Lucky Find (2 influence) or Day Job (1 inf, Slow, antisynergetic with Apex's ability).
This wouldn't be a problem if Wasteland could be realibly triggered on the Corporation's turn, but you only have Hunting Grounds so it ends up being a poor man's Data Folding. That's sad.
Ok, so it's fine, right? Apex doesn't need thaaaat much money and you have 25 influence. So you buy 3 Lucky Finds and put them in your deck alongside Prey, Dirty Laundry, Apocalypse, your singleton Levy and a bunch of other events. Then you realize that half of your deck is composed of events that take space in your hand and you have absolutely no draw.
Really, how is Apex supposed to find Apocalypse? And you not only need Apocalypse, you need Apocalypse and Endless Hunter and DDos and Prey and a bunch of cards. And if you spend even more of your influence on draw, you quickly realize that you are forced to discard because your whole gameplan relies on situational events.
If Apex had a +3 Handsize modifier, you could run Quality Time and everything would be fine. But he doesn't have that modifier.
Seriously, no matter how many Apocalypses you have, without Maker's or Legwork you are not going to win. Ever. Your best chance is to mill the Corp and wait for it to kill itself. I've tried, if you only make single-acesses and Apocalypse runs, you lose.
So you need at least 4 influence on Maker's Eye. Which is yet another situational card taking space in your hand.
AND NOW WHAT?
Ok, so you buy everything. You spend 6 influence on Lucky Find. You spend 4 on Maker's and a lot on draw. Now...how the hell are you supposed to win?
Seriously, Apex has a total of 7 cards. Of those, the only two that can help you actually play Apocalypse are Endless Hunger and Heartbeat. And it's not enough even if you also play the expensive Overmind. You need DDos, Run Amok, you know, actual threats. But they all cost 2-3 influence which you do not have because you had to spend it on Lucky Finds, Maker's and draw.
TL;DR: Apex doesn't work and cannot work because it has massive holes in its card pool.