Don't know about optimal, but here's my simpler setup, I used item translocators.
Cobble gen behind it. All 1 stack of speed, and rest world interaction. I also used the water for witch water, etc, so not pure cobble gen.
Bummer, was so excited as I plopped down my first emc condenser on the AE network to kablooey crash =) Figured it was rv3 right off the bat.
Eagerly look forward to your updates, and thanks for the super fast response!