As long as you don't screw up, you should be able to move up 1 rank every year. But Big 4 really has horrible work life balance, a good time to leave will be when you're around SA2. By then you'll have some experience with leading a team, yet before you start having to deal with the stress that comes from dealing with Partners when you move up further to AM.

Leave at SA2 and gun for another increment to cross the 5K mark. Don't waste your time especially if you're a guy who has already wasted 2 precious years in NS!

I think this has gone way off tangent from the thread topic lol