Hi everybody,
This is my first post here, I'm just looking for advice on a list I've written for a pretty serious tourny (big prizes)
Last time it was on it was 1000pts and I came 5th out of about 30+ guys, I want to improve on this so any advice would be greatly appreciated,
thanks,

HQ 288
Flyrant 167pts
2 scything tals, wings, warp blast, adrenal glands(ws), and Implant attack
(guy who can second last time had an awsome flyrant so i thought Id go get one )
Devilrant 121pts
2 sets devourers, toxin sacs, Psychic scream,

Elites 440
8 tyranid warriors, 220pts
Extended carapace,1 barbed strangler, 2 deathspitters, 4 devourers, 1 set of Rending claws and 8 sets of scything talons.
8 tyranid warriors, 220pts
Extended carapace,1 barbed strangler, 2 deathspitters, 4 devourers, 1 set of Rending claws and 8 sets of scything talons.

Troops 600pts
20 Spinegaunts 100pts
spinefists
20 Spinegaunts 100pts
spinefists
20 Spinegaunts 100pts
spinefists
20 Spinegaunts 100pts
spinefists
20 Spinegaunts 100pts
spinefists
20 Spinegaunts 100pts
spinefists

Heavy Support 421
1 Stranglofex 113pts
Barbed strangler, Scything talons
1 Stranglofex 113pts
Barbed strangler, Scything talons
3 Zoanthropes 195pts
Warp blast, Psychic scream

1749pts