It's still a dopamine agonist, why use it when you can control estrogen/progesterone with aromasin? I don't really feel like finding the study right now but I'm pretty sure the dose wasn't a gram that caused the heart problems.
I have seen study, it was either a gram, or more..
Also, just because you block estrogen does not always mean progesterone sides will cease.
You can still get deca dick and prog gyno with an AI..
There is nothing wrong with low dosing caber, or at least having it on hand.
If you are scared of caber, you could use bromocriptin, "safer" than caber and cheaper..