check this out... get some apc's and load them up with engineers. get 3-5 adv. carryalls. with the help of ixian projectors, replicate about 30 - 50 of a medium-class unit (i.e. moongoose, assault tank, las tank, anything moderately priced). realistically, they should be accompanied with 7 - 10 real units. then, make them all "siege" an enemy base. the human opposition would obviously freak out, and their screen would stay on the front, where they are supposedly being "attacked." make it harder for them to control their defenses by making 1-2 advanced carryall fly around on top of their base. some air attackers would be good too. if u have the guts, throw everything you have (harvesters, scouts, infantry from sold buildings, except the apc's and engineers) at the enemy base. this way, they'll think ur giving up and committing suicide, even tho ur really not... then, while this is happening, airlift ur apc's with engineers into the enemy base. ur human opposition will be so distracted he wont even see it coming. u should obviously come around into their base and avoid their defensive front. the airlifting requires the right timing, so all of the enemy units would be absorbed at the front. not sure this might work against atreides, with their rocket towers. this might actually work kind of better for harks, since their engineers are actually armed (somewhat to a degree...)