Doing the same thing over and expecting a different result? That is the definition of some word.
I expect this one to last about the same number of heat cycles as the last one. Remember that you have aluminum heads and intake. Aluminum has about 4 times the linear coefficient of thermal expansion as cast iron.
When you do it the next time, and you will, keep going over the bolts at your final torque until none move. I had to go around mine about 5 times.
Yes my felpro gaskets only lasted a couple thousand miles. However the end bolts at all four corners were bottoming out before pulling the intake down. Edel heads and intake same as you. When they tapped the bolt holes, they didn't run the tap in deep enough. The threads tighten up like a pipe thread. So check to make certain that the bolts turn all the way in by finger. I didn't build it the first time, but I found it and fixed it. Fairly easy fix.
PS: Go ahead and get the Victor Reinz gaskets now. No hurry, since your up and running. Take your time and find them. They are worth the trouble to find.