mech up and hit them in the flanks and leave your heavy weapons to pop the kans and act as bait for the phalanx while your flankers use shorter range weapons to reduce the number of orks you will eventually have to face.
hope this helps
Remember to use the BRB not the SRB from black reach... makes for a much better implement of physical enlightenment through repeated smacking on the head.
Ah... the simpler times of the 1960's. When pedophilia wasn't frowned upon.
“Thou shalt not invite a Banshee to Karaoke”