Join Date: Apr 2015
Location: Newcastle Upon Tyne
My current standing Tyranid list is actually pretty similar (Although somehow I've ended up with five Carnifexes, but hey, I'm a sucker for bundle deals) and personally I feel I'm lacking in ranged anti-armour firepower, so I'll be looking at Zoanthropes and / or Hive Guard next.
I'm very much a fan of my Mawloc, but then I tend to play my Tyranids to troll rather than to win (though occasionally winning is a consequence). See: Sporefields
Unfortunately as has already been mentioned, Tyranid MCs aren't quite the giants they used to be, and Tyranids in general aren't overly competitive without bringing slightly odd lists. (If I'm not mistaken, the highest ranking Nid player in the 2015 Nova open was running Six TLD Flyrants with a Malanthrope Brood, a bunch of Spore mines and some Tzeentch Daemon allies)
Not that I've ever played in a tournament, but I get the strong impression most of my lists would get stomped rather hard.
I am actually a fan of the Maleceptor, as I've proxied one with some proxied Zoanthropes (try before you buy, eh?) In the Neural Node formation that allows Zoanthropes to re-roll 1s whilst Harnessing within 12"(?) of the Malanthrope. I don't think the Maleceptor actually cast any powers, but as a Warp charge generating source of re-rolls (plus synapse, increased SitW range, etc) in a Psyker heavy list, this thing worked a treat. Although if your opponent brings a Culexsus, make sure the tear bucket is to hand.