Yeah you're right, missed a parenthesis somewhere, it is only 179.51.

The issue you're going to run into is that you simply won't have Sharpcast for your 2nd Astral, and doing double Foul with current Spell Speed will leave you to do a Blizzard 1 to keep up your stacks if anything should make you move, or you risk losing a Foul. There is no reason right now to sit on Foul stacks unless for some reason we need to double Foul anything to kill it quickly enough, which I doubt will ever happen.

The only place you can safely use Foul in Astral without any kind of procs is during your Hearts after Fire 3.