Orcs have great non-rush builds. They have several high HP units and combined with Chaos, they can be resource strong defense wallers with field sweeping tactics cards for the late game win.
I played a game last night. Orcs won. But not because of rush tactics. I stalled the rush, but they swept the board multiple times through out the match. The final killer was Smash-Go-Boom to destroy all my developments in one zone, causing it to burn.