Well I'm on a simple type map, lots of random connections over so I had to worry about CPA coming from multiple entry points, not like a tree/spoke where they all converge to one defense point necessarily.
The enemy's gate is down
Got both AIs, 80 planet no resource handicaps level 7.
I two punched each one - the first wave took out all the guard posts, the second wave finished the job.
I did a lot of lazy things - I never made a forward base two jumps away (was scared to aggravate the MKIV and didn't want to invest in more turrets to hold that base), I just built 20 transports at my outermost point. I lead with 5 empty transports to take all the damage and divert attention (and an EMP on the first hop to get past the "crusted" planet). I had 23k unspent knowledge and only captured 1 ARS (electric shuttle), and no mark IV factories or zenith power reserves or golems. I researched MKIIIs of each basic ship type, never used any special capturable factories or zenith reserves or anything of the like. There were no dyson spheres (turned it off, seems a little too cheesy).
My kill loss ratio was 93%, under both AIs (who had 97% and 110%) - but that's fine, after all it is against overwhelming odds and I wasn't playing just a defense game, I had to go out there and burn ships to kill the last command post. After I killed the first AI the AIP was just over 400. Finished in 7 hours, owned 22 planets.
I really love using mass fleet ships in tranports. Starships are such a bother because you wind up having to use fleet ships anyways to augment them and deal with mass drivers (means more time spent alerting planets because mass drivers are tough and are located on both the guard and the core planet). They are really slow too and can't be put in transports. Screw starships