(Edited: )

The robo will be in time for DT's even if you are a bit you can FF your ramp at minute 7 at you will have a lot of time for your Observer.
Wilko sayed that you can even beat 4 gate with it WHEN you play PERFECT. Means Perfect FF no wasted Chrono no supply block. 2 Gates can beat 4 Gate. And if you add more Gates/ a robo it should be fine too.

There is just one thing that it dies to. Blink All-Ins.
So the best maps are Daybreak and Entombe (Because less Stalker Player)