I like the cycle, looks good and clean. And 700mg of test prop is not what I would call a low dose for most. You are correct about what you said about mast.
I always use adex, how much I use depends on the cycle. Like you, I have never used aromasin, it's stronger than adex, that's for sure, but adex has always worked well for me. So I'm not sure if I want to fix something that ain't broke.
Still, after reading newer studies....I would opt for aromasin my next time around at 25mg ED if you are worried about gyno. Another thing I like about your cycle is that you can start PCT much sooner than if you were using all longer esters. More pinning, but you glide into PCT much easier, IMHO.
Lastly, I'd keep away from all blends. If you want a blend, do it yourself. Who knows how accurate the doses are in the blends. Anyway, good luck with your blast....it should be a "blast"!
/V