[Suicide Junkie]

You will also need to research a ship hull big enough to haul the SY component.

It would be a good idea to try and bring a couple SYShips all together, along with a decent defense fleet to protect them while they work.

Build yourself a base with a SY so you can continue to build up there and let your ships move on to other projects.
The SY will provide some repair ability, but adding a dedicated repair base couldn't hurt.

A few main battle fortresses near the warppoint is good. You may also want to add a larger number of small stuff around the edges to prevent ships from running away.

---

Overall, since it sounds like you're under immediate threat, satellites are your best stopgap measure. Just build a transport with sat launchers and plenty of cargo, and load it up with long range weapon sats to sprinkle liberally around.
You can also place one or two in the hexes immediately surrounding the warppoint to cut off avenues of retreat.