In the AE book I suggested an idea of 1 EPS per game session. Now, I did this because I enjoy long games and have had for the last couple of years a very stable group.
You could easily give 2, 3 or even more EPS, just keep in mind that it very much accelerates your players. Sometimes that what's you want so its appropriate. Other times its not. To keep from widely varying your EPS gifting I suggest you determine a method you can share freely with your players and stick to it.
As a note, giving more than 3 EPS seems to really destabilize characters. Allowing them to ascend too rapidly means players jump over and lose attachment to important abilities they gain with secrets. Keep this strongly in mind.