Your strategy worked, Thanks!
Just needed to take out factory, barracks, orca pads and refinery and they stopped producing units but did not rebuild the base. Then I leveled up my units destroying tiberian lifeforms and old Nod buildings and picked remaining GDI units and buildings one by one. Once that second GDI base is out of the game this mission becomes much easier especially if you capture GDI Con. Yard.
HTNK
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