That's a lot of melee and not so much anti-tank. I think I'd swap the jetfighter out for another ravager, because you're going to want to crack as many transports turn 1 and turn 2 as possible, so your grots can assault the gooey centers on turn 2.
Aside from that, I think it'd be an interesting army to watch. Maybe not super-effective against other highly mobile armies like Tau in battlesuits. Also, GMCs and superheavies in general are going to make this list cry, in my opinion. Assuming they're allowed in the format you're playing, of course.