Fair enough, Carnifexes should be next as they are great
Tyrannofex's with Regeneration work well though at smaller points games, although I would drop Regen if you have the option to buy something else, like a Zoanthrope for example.
Spinegants are great and what I am normally taking these days simply because of Twin-Linked.
I think, if you were to take Warriors, have
MSU so that frakk missiles don't ruin your day, say two units of three.
With what you have told me, this may work out better for you:
Flyrant with 2x Devourers, E-Grubs
Flyrant with 2x Devourers, E-Grubs
3 Warriors with Barbed Strangler
3 Warriors with Boneswords and LashWhips x3
Venomthrope
Zoanthrope
Tyrannofex with Acid Spray
This gives you lots of targets that the opponent has to deal with. The Flyrants should be able to deal with Light Vehicles and the Tyrannofex with Infantry. I put Boneswords on the Warriors so that they can deal with
MC and
MEQ, but it may be worthwhile ditching that Zoanthrope to give them Toxin Sacs if you need them to face Wraithknights.
My only real concern with that list is heavy vehicles like
LR, which is why I like Carnifexes

but for them, you can ignore them or fire EGrubs on them until the rest of the army is destroyed.
It sucks that the Malanthrope is banned, as it would really help you out :/
You could also replace the warriors with Spinegants and find the room for the Mawloc with Adrenal Glands, something like
Flyrant
Flyrant
Spinegants x10
Spinegants x10
Venomthrope
Zoanthrope
Tyrannofex with Adrenal Glands
Mawloc with Adrenal Glands
The two Heavy Supports should help out against vehicles, or you could switch the Adrenal Glands to Regeneration on the Tyrannofex, but I think the S7 AP2 attacks on the charge will be more useful. Four
MC should have no problem Smashing vehicles. While the Mawloc is Hit or Miss, it is the best
MC that you have available to you (Flyrant aside)
Hope this helps you a bit - Dakkafexes get them!