- Brit should have targeted the Pio building the T4 Panzer Command with the Stuart which might have ended the game right there.
- If under attack while building, get more builder units to build faster. If possible, move your builder unit close to the Headquaters/Barracks or another building which allows reinforcements while building. In the worst case, you can try to build the same building in parallel in another corner of the base, if you are lucky your opponent will not notice (if you delete the building before it's finished, you get the resources back).
- If you know that Roos are coming, put some mines around and in your base, at least slowing them down.
- Get vet1 for your tanks, it's a great value for the investement
- With all your munitions and command points, you could have gotten some artillery like Firestorm/V1/Rocket Barrage for attacking the brit fortress and possibly weakening his infantry force as well.
This doesn’t really convince me about the viability of T1-T4 against Britts ...