I’m sure they would stack very well. Very mild on the system yet quite effective. This would be a very smart stack.
If you did want to add something else, a third thing, I’d be thinking the PRE Hex-D at 2-3 caps a day. It would be another mild yet effective hardener. Probably not necessary, considering everything else.
Adding something like that would make the whole thing a lot more suppressive though, 11oxo and epiandro/andro are not very suppressive if even at all. Extremely mild.
Hexadrone when legit is shown to be fairly suppressive, on the other hand.