Choke Point strategy for 1 star map where two empires are divided by one gravity well.
In particular, the pirate base's gravity well, most commonly, on the Random Small map. I don't know why, but that seems to be the usually divider between two opponents. Anyhow, here is how I make use of it:
This is the general layout of the particular random configuration of this random map, though that last two times I played on it a pirate base also separated me from my opponent, but here it is:

At the former pirate base, I have assemble my entire fleet, including 16 level ten capital ships, composed in this way:

And the structures at the pirate base are these, though many variations seem to be equally good:

Also, I've found that having the fleet stationed adjacent to the starbase set to Local Area for range works best for keeping the fleet near the starbase and allowing them to sally forth and attack with more force than by holding position.
Also, the upgrades for the Argonev which seem to work fairly well for me, at the choke point assisting the fleet, are hence: 2 Weapons Systems, 3 Structural Integrity, 2 Docking Booms, and Auxiliary Government.
I'm sure there are many other ways to set up choke points for slowing down, detering, or destroying an enemy fleet. So if you'd like please share what your strategies are when using phase lane choke points.
And remember, have fun blowing stuff up.
