Looks solid to me. Everything after ring + weapon + chest is just fluff, most of the good stuff's Gordian.
That said, if you've got SMN at a decent iLVL already, why not roll with that if you're aiming to down A3S? SMN's perfectly great for A3S, and that's when your group will truly start getting geared up, from the pants/twines. If it's to gear BLM up for A4S, well, can't really argue there, but your interest otherwise should be in what gives you the most chance of drinking Pepsiman up IMO, and that would be continuing gearing up the better geared of your casters.
