It cannot be done, here is why:
When the console pushes the license, it will intermittantly grab all of the mixed license files, and it won;t match, so it won't work. This WILL stop a push deployment.
I see 3 options here:
1) use 2 consoles
2) upgrade the EP to EPP (50% upgrade discount through a reseller)
3) down grade EPP to EP (I have never been successful in doing this, but I haven't tried lately)
Sincerely,
J.R. Guthrie