Atreides and Ordos can both build the Ornithopter starting from mission 7 onwards. The unit requires that I build a HI-Tech factory and upgrade it, after which the flyer can be bought for the same price as a Heavy Factory Siege tank. But does this pricey but fragile attack flyer have any practical use whatsoever? Whenever the enemy attacks with these units, they will be fairly hard to shoot down unless I have built at least a couple of rocket turrets, and they are a proper threat against my tanks out in the open. My own ornithopters, even if I already have destroyed the enemy construction yard and taken out their turrets, will take forever to actually destroy anything seeing as the enemy simply repairs faster than the ornithopters can damage them. Add in the non-controllability into this mix and I usually give the ornithopter a pass in favour of standard tanks.
How do I efficiently use this unit? Is there at all an efficient use of them?