Good job, well, I prefer using Heavy tank+Artillery+Engineer+Air units. Heavy tank can against most kinds of units, also can take more damage, with engineers repair, they can hold longer, also can do more damage. Overlords's air transporter is good for surprised attack, maybe can practice to use that, then can try to attack opponent from different side at same time, this will make opponent make more mistake.
Good job, well, I prefer using Heavy tank+Artillery+Engineer+Air units.
Heavy tank can against most kinds of units, also can take more damage, with engineers repair, they can hold longer, also can do more damage.
Overlords's air transporter is good for surprised attack, maybe can practice to use that, then can try to attack opponent from different side at same time, this will make opponent make more mistake.