Thank you for the input, gentlemen. A group of friends and I got together last Friday night, and here's how it went down:
- Played a game with my Orks (about 20 models, 1/2 of them Grots) vs a buddy using Space Marines (about eight models). Was a lot of fun (for me, anyway) as my Grots were blasting Space Marines and he was failing 3+s like a boss! Sure, I lost 1/2 my guys, but that's what Orks do anyway.
- Another pair of friends payed Necrons (about 10 models) and the other using an elite 5-man White Scars unit. Re-animation Protocol won that easily, and the White Scar guy just couldn't make enough 3+ saves.
- We than had a 4-way combat; same buddy as in the first game, but this time a Sternguard Veteran squad (five models), a Chaos player with a mix of Thousand Sons and Cultists (12 models), Gene-Stealer Cult (12 models) and a Nurgle Chosen team (five models). The Sternguard just turtled up in some terrain in his deployment sector and shot the crap out of everyone and won the game, however, if the game had gone at least one more round, the GSC probably would have wiped them out in close combat.
From this limited experience, either an elite shooting team with good range or masses of cheap bodies seem to be the way to go. We all enjoyed the game, and will be playing again this Friday. Strangely, no one brought any vehicles, and this week I'm leaving the Boyz at home and bringing a six-man Chaos Space Marine team (Mark of Khorne) with a Chaos Rhino.