My experience: I 'd say Activity first, it is real easy to start, but exhausting.
Also, your mirage could be very attractive, because they share the even numbered function with your dual, so you can relate to that. At the same time they will try to trigger you into using your role function, which in the long runs makes you behave like an arse, and the first one that is going to be bothered by that, is you yourself:
In the case of IEEs, super-egos can also be very attractive, but is this is a general thing or just IEE-SLE, I don't know. What I do know is that this relationship between IEEs and SLEs, when romantic, can be quite a roller coaster ride, each type increasingly going more out of bounds with their super-ego functions. For an IEE male, an SLE female can be the "bitch that did everything", after which you have been spoiled for the rest of your life:
And finally, you semi-dual of course. This is probably the second best after duality. Problems and frustrations can arise, but there are enough things in common to work out such issues and overcome them.