Weeelp, I tried it out against that ole Steel Legion list of mine. Orks lost.
HOWEVER, The Fighta Bombas did GREAT. The 5 strong skwadron on it's first activation blew up two basilisks. The smaller flight... well, it kinda dove into the middle of IG flak and got shot down by five hydras. Learning experience. I think I should've tried to snipe a lone hydra(I'm pretty sure I could have manuevered the fighta bombas in such a way as to only be subject to that one hydra, had I used my brains). But being able to basically fly over and take out a basilisk battery at the begining of the game is useful.
Those Zzap guns are worth it to. They didn't kill anything impresive, but they were good for putting blast markers on enemy formations, and I suppose that's a good thing.
I'm starting to get a handle on the Orks. Just because they have +2 to Engage or Double doesn't mean that's all you do. I'm starting to figure out these: if my Gun Bumz unit(the one with the big gunz) tries to Sustain fire and fails, then as the hold action I can fire an penalized barrage off. That's useful. Also, Supreme Commander is good for ensuring that I get a sustained fire off it it's critical.
The unit with the Stompas and dreds... I'm just not convinced yet. I might end up tossing the Stompas and dreds. The Stompas alone are 150pts, that'd allow me to buff up both Fight Bomba Skwadrons to 6 and 4 strong, and I'd still have 50 points to spend on something else. If I drop the Dredz, then that's 125pts I can free up.
If I drop the Boyz and Grotz from the small warband, that's 200 points, enough to make that a big warband, AND have 50 left over to buff something else.
Or I could bring another formation of something.
The Kult of Speed hasn't really been very useful, yet. It did claim the blitz, but I'm wondering if maybe it should be bigger? It feels awfully fragile.
But yeah, are Stompas worth it?