lets say you took a map along the lines of smfa "uterus" and divided the 3 countrys by 4-8 grids of water .
leave a fairly vast ocean in the middle with a large group of small islands close together in the very center, (1 to 1.5 grids apart 7-15 isle's for each country or so )
so this creates a furball zone in the center . (just a guess here but id figure on it being 8-15 grids away from the main isle's )
you place 10- 15 cv groups w/ ports and a small field by each port for each of the countrys main isle's .
on these main isles you set up a normal amount of bases ,and gv hangers dividing the airfields . (perhaps limit the higher alt bases to the interior ) i like Tilts idea of placing some of the ports in coves or small inlets , with a couple of shore batterys to protect them, and pt spawns just off shore perhaps.
now dont place cv groups for the center islands , but make them have to travel to get there .
I'll put my idea on paper if your interested . but i think it could work strat wise .
(like any idea its open for comment/improvements )