The friend I play with the most plays orks, and he's pretty good. The suggestions I have are; I'm not sure on your friends flavor of orks, but if he plays anything like my friend these tips should be helpful;
1) Use wyches, Wyches destroy orks in CC. first off, you out initiative them, easily. Secondly, they're not well armored, so, unlike dealing w/ MEQ's your regular wyches will actually do a lot of damage, as opposed to relying on the succubus. Third, they have either 3 str or 3 t, I forget which (the other is four), which means they don't wound you all that often, or you wound them more often. In either case, you're going to win CC against them, even against the nob squad and warboss retinue.
2) Splinter Cannons and mobile warriors (raider squads, etc...) are much better then dark lances most of the time. The orks don't have all that much armor, and if they do take power armor, they move d6 instead of 6 each turn (and its only the warboss/nobs that can take it). If he does that, focus a darklance from a raider on the warboss and kill. Also, you might be able to kill the warboss if its T is only four, not sure on that though, instantly with a DL.
3) Take out the trukk fast if he has anything in it, don't let it get across the map because you want to make sure you control the pace of the charge.
4) Their leadership is terrible, horrorfexing them would be pretty possible.
All in all if you meet his CC w/ your own CC (wyches mainly) you'll pretty much win everytime. Plus, unlike most MEQ's, you can EASILY beat them in a round of combat, and sweeping advance for a massacre. Because their init is so low, this is amazingly simple. If you do use any warriors, you're better off not making them stationary, and if you do make them stationary, guard them w/ some haemoncs w/ destructors or with a talos for counterassault, because if you leave your heavy weapons guys just sitting there, they're going to eventually charge and slaughter them.
-Slathe
1) Use wyches, Wyches destroy orks in CC. first off, you out initiative them, easily. Secondly, they're not well armored, so, unlike dealing w/ MEQ's your regular wyches will actually do a lot of damage, as opposed to relying on the succubus. Third, they have either 3 str or 3 t, I forget which (the other is four), which means they don't wound you all that often, or you wound them more often. In either case, you're going to win CC against them, even against the nob squad and warboss retinue.
2) Splinter Cannons and mobile warriors (raider squads, etc...) are much better then dark lances most of the time. The orks don't have all that much armor, and if they do take power armor, they move d6 instead of 6 each turn (and its only the warboss/nobs that can take it). If he does that, focus a darklance from a raider on the warboss and kill. Also, you might be able to kill the warboss if its T is only four, not sure on that though, instantly with a DL.
3) Take out the trukk fast if he has anything in it, don't let it get across the map because you want to make sure you control the pace of the charge.
4) Their leadership is terrible, horrorfexing them would be pretty possible.
All in all if you meet his CC w/ your own CC (wyches mainly) you'll pretty much win everytime. Plus, unlike most MEQ's, you can EASILY beat them in a round of combat, and sweeping advance for a massacre. Because their init is so low, this is amazingly simple. If you do use any warriors, you're better off not making them stationary, and if you do make them stationary, guard them w/ some haemoncs w/ destructors or with a talos for counterassault, because if you leave your heavy weapons guys just sitting there, they're going to eventually charge and slaughter them.
-Slathe