What does EX report look like...they are big EX pullers-
AMEX typically pulls EX, so your TU score isn't a good indicator.
I was accepted for AMEX Clear with very little history (zero history with AMEX) when my EX was a 714.
I got it with a sub 700 credit score. But I started with the Zync for a year, dunno if that helped...oh and I have their savings account too.