Primal

I also believe the Ordos wall is doable. AA mines for air, Kobras for main attack, laz tanks in back. Place a few pop-up turrets behind the front lines (so that nothing sneaks into your base) and it's done. That's not much more expensive then the atriedes (Mino,mongoose,repair vehicle,sniper) Might even be cheaper. and all the ordos units self-repair. I find that to be extremely useful as Atriedes repair vehicles get killed very quickly. Kobras can also take a lot more punishment then a Mino. Though their range isn't as good. (Inkvines and Minos make for a big problem as they are put of the Kobras' range). But that's what Laz tanks are for or high ground. One can also move the Kobras to in range. (Perhaps using a laz tank as a decoy to buy time). Self-repairing is great for turtling though.

That's what I meant. :) Use the elite Kobras that were once defending till they became elite to attack and replace the elites that are now attacking with new Kobras for defense.

Kobra's make excellent siege and defense...if properly supported. One good way to attack with Kobras is to wait till they are lvl 3 and FAST...do this by having them defend. Then attack with the elite Kobras and replace the former defenders with fresh Kobras that will then level up. That way they will kinda keep up with your other troops.

EITS's: there's nothing more fun then watching half the enemie's base go instantly. I also like Kobras, for defense and siege. As for why I think Ordos are best.....they have effective suicide units, hovering.... self-regeneration + regenerating shields. That's double regeneration. ;D