This is probably the most difficult Prime Unit server that I've dealt with in the entire network, I've highlighted my approach to tackling this server in some steps below. Keep in mind this is only one way of dealing with the Prime Unit, this was the most efficient way with the setup I have.
The strategy I used for this server was to keep the Titan Aug on for as long as possible to fulfill the server preloaded patch criteria and be able to survive while at the same time dishing out some serious damage.

Here you can see that the server is preloaded with a Damage Ban patch which makes things harder if you are aiming for a high score. To help with Titan Aug maintenance we added an S-Rank and A-Rank Energy Modifier. If you've invested in Energy Augs then you can swap out the A-Rank for a Avatar Weakness Patch for a higher score multipler since you can't get hurt during Titan.

Next you're going to want to unlock or turn-on your Titan Aug and invest in the energy saving enhancements which will help greatly. If you have enough praxis consider investing in the Energy Aug tree to further boost your energy.

Next on the preparation is too load out your inventory with:
- Biocells
- Energy Expansion Kits
- A High DPS Weapon (S-Rank Preferable)
- AP Bullets
- EMP Grenades/Mines (Disable The Sentry Bot When It Moves Towards You)

Lastly you should fine-tune your weapon for DPS as much as possible, as I've said before S-Rank is preferred as it has the most upgrades and damage potential. Also you should take off the silencer if you have one because it will reduce your damage output.

Once you enter the server hide behind the railing a bit north of where you spawn and you should see a Sentry Bot with a yellow warning sign. Next turn on the Titan Aug and start unloading your weapon on the robot, you can drop some EMP mines if it starts walking towards you. At this point you may wonder why you even need Titan if the robot is disabled, the reason is that once you start the fight, every sniper and gunner in the Santeau Server will start sniping you and without Titan your health will drop faster than Jensen's Icarus Strike.
That's all I've got, have fun in Breach.