Chase told me something a long time ago - a tiger's stripes don't change, they just get better at blending in.
People break-up for a reason and, generally, the things that caused the separation don't change so I
personally don't recommend it unless very specific conditions were met and it doesn't sound like they were.
It's fine if you want to reconnect and see where things go but she should be doing the bulk of the work. The mindset to have here is "We broke up, I moved on and I'm seeing new women who have already proven to be worth my time - I won't stop seeing them just because we had something, if you want me then you have to be better than the new women I've met."
That aside, Fuck This was responding to what you implied with asking
"How long to wait after she texts, how available/unavailable you should seem, etc."
because you're asking for an angle to play. Plus, the fact that you don't already know these answers
seems to indicate a lack of experience (as does your response to him) so while his response might seem haughty or immature there's some grain of truth to the point he's trying to make.
Anyway, that usually isn't too big an issue but if you actually have a lack of experience then going back into a relationship that already didn't work out definitely isn't the best idea because you're likely just trying to secure access to sex/commitment because you cannot get it somewhere else. So, that's something you really need to think about - IF (and really be honest with yourself) you want her back because you feel you cannot get laid or find a better girlfriend elsewhere then you should be tackling that issue and you're in some of the best hands possible to get there.
Now you've got some options to think about. I'd like to stay updated on this situation as it pans out and if you have any other questions then feel free to ask!
-Richard