Beginner's Army List Help ? just under 1,400 point

[genebassist]

I used to collect 40k 4 years ago and recently found my old Tyranid army, just brought the new Codex and also a Hive Tyrant and Venomthrope mainly because i really liked the look of them and just wanted to paint them.
But I've made an army list with the models i have, i'm just looking for advice on upgrading my army without getting more models, because i want to get back into gaming and get used to the 6th edition rules.

Here's the List:

HQ - 255pts
Hive Tyrant - Wings, Old Aversary

Elites - 55pts
Venomthrope

Troops - 608pts
3 x Tyranid Warriors - Venom Cannon, Deathspitter x2
10 x Genestealers
10 x Genestealers - Broodlord with Scything talons
15 x Termagaunts - Devourers, Toxin Sacs

Heavy Support - 440
Carnifex - Twin Linked Devourers, Stranglethorn Cannon
Carnifex - Twin Linked Deathspitters, Heavy Venom Cannon
Biovore

So there is my army list, any help on improving it without adding new models would be awesome. And tactics would also be very great as i'm planning on hitting the local GW soon as

[Illithid]

Give the flyrant either t/l devourers or boneswords/lw + t/l devoured combination. I also give both carnifex mycetic spores and equip them with t/l devourers also.

To do this, I would drop the lone bio ore and replace the vc on the warriors with a barbed strangler.

[Deleted]

General tips;
HVC/VC are both terrible in 6e
DS on MCs are vastly inferior to TL Devourers
If you run one Winged Tyrant, give it TL Devourers. That is our only AA!
Genestealers in 6e seem to run best in small groups with Broodlords.
Genestealers benefit greatly from TS, rerolling failed to-wound rolls means more chances to rend!
TS for Devgants isn't the best expenditure, consider that you want to avoid CC with Devgants. Not get into it.