If you do a decent Isis FH with your hunters somewhat undisturbed on high hunt you should up Heroic max 8:00, not alot later atleast. Read that guide Squeoo posted. Can't find a specific rec atm.
With the free Sphinx along with some priests, free tower upgrades and no god power usable in your home base there's no way some Hoplites could trash it if you play properly.
When you hit Heroic you should get that Migdol up as fast as possible, if you can then place it near a "hot spot", ie gold mine(s) or near a foward TC, preferably both. From here just start spamming whatever unit(s) you see fit, Chariot Archers in most cases since they're really good for raiding/defending and train fast.
Isis is pretty much the hardest civ to rush when you think of it.
[This message has been edited by Nirwanda (edited 02-09-2008 @ 03:03 PM).]