Great success, first win versus the 'nids. Woo!
He brought Broodlord, Flyrant, 2x12 Genestealers, 30 Termagants, 3 Hive Guard and 3 Carnifexes. First time playing Maelstrom missions for me as well, enjoyed it.
Honestly I think my opponent didn't really play optimally (he hadn't played for very long either), but on the other hand I think I played it quite well. Took my time thinking through movement and measuring distances – something my opponent did not to his detriment – and made sure to take out the big bugs asap.
The VenDread did work and took out one Carnifex with shooting turn one before charging and nearly killing another in melee turn two. Razorback was surprisingly effective as sort of a distraction Carnifex (how ironic) and blocked off one flank surviving a surprising amount of melee. Frag cannons did most of the heavy lifting and torched infantry left and right after jumping out the Corvus. His big messup was charging my shotgun/frag squad with his termagants (why I'm not sure, he knew about the auto hits and I had a VV anyways to fall back and shoot). 27 charged, 4 made it in.
We messed up a few rules (the big one being letting flyers hold objectives) and I forgot my Lord of Hidden Knowledge almost all game (the 8 CP was still super helpful though). To be fair I rolled well in some crucial moments and he had one or two spectacular failures (that's the way it goes when you don't bring your own dice and borrow mine instead ).
I'm a bit on the fence about the Corvus. It's quite expensive for a delivery mechanism with a few ok-ish guns on top, but on the other hand it drops frag cannons in auto hit range (which deep striking does not) and that has proved very useful. Also contributes some decent dakka. I'll keep using it for now since I don't have anything to replace it with, but I'm unsure if it will make the cut once I have more options. Maybe another Razorback or two would be in order.
Anyways, just wanted to share my success and thank you all for your good advice Purge the xenos, for the Emperor!