I tried your strat Dragon and could only get to 10:24 as my best time. I modified it a bit and got 7:43.
Queue up 2 SCVs
Lift off barracks and send to rebel base
Send 6 marines to get gas and mineral on other side of road
Leave marines at road and get SCVs gathering and building supply depots
When barracks lands, get it making marines and put rally point near the rebel forces
As soon as the first marine comes out, the rebels will be under your control
After the second wave of attacks, you can bring the original 6 marines over to join up at the new base
Bring an SCV over and build 2 more barrakcs and continue on with your original strat.
http://forum.valhallalegends.com/files/Outlaw.jpg