Posting this Fort Condor strategy in here for myself later when I need it. I'll put it in spoilers just in case.
Take the set-up with 2 Balistas and 3 medics
As soon as the game starts you counter the first enemy unit on the side it will spawn
Once your unit has advanced a bit you put your Balista right in front of the enemy base and then you put medics and finally another Balista
You spam countering units near it whenever your medics/balistas are threatened and you clean up with champion units
The key is to put your units in the middle so that they will attack the main base so you wont waste any time
Enjoy free win.
https://imgur.com/WqDcNNq
https://imgur.com/89Z5jrB