When I use Prop to kick of an enathanate cycle, i go eod for 2 weeks, not 4.
In your caase, i think that with the tren, 4 weeks is more than long enough to "kick things off"
As far as using prop to "slide out" of an enathanate cycle, i dissagree here also. Thats when you need to go 3 minimum weeks with the prop so you can cut things off fast and begin recovery.
The concept we are discussing is a very valid one, and in my opinion, makes sust useless if you think about it.
Using prop to slide in and out of longer ester Test cycles is a real sano Idea. Remember to run nolvadex 1 week before you start a prop cycle to limit water retention, as it can happen fast. It is always a good idea to run arimidex/nolva/proviron 1 week BEFORE you cycle. Gets estrogen OUT OF THE WAY before you cycle.
Good Luck whatever you decide.