One tactic to consider is putting a logistics station down on your friendly wormhole underneath a couple FFs, then just defending the station.
It makes the ships come to you, staggering them out due to the different move speeds and the turrets you build 'cover' all 3 wormholes because the ships all head for your command station.
This strategy does require a decloaker or other tachyon structure though, your turrets have to see the ships coming for it to work.
D.