2000pts Mech BA vs Swarm Nids

[Wolfshade]

Hello, after being tabled a couple of weeks ago I am once again fighting some more nids but at 2000pts.
Last time I tried an all out assault and while I did have some out standing units dread and mephiston it wasn't too great. So here goes:

HQ - Mephiston
Elite - 5 Assault Terminators + Land Raider Crusader w/ Multi-melta
Elite - Furious Dreadnought heavyflamer blood talons
Troop 1 - 10 Tactical Marines w/ flamer + missile launcher
Troop 2 - 10 Tactical Marines w/ flamer + missile launcher
Troop 3 - 5 Assault Marines w/ power fist + Razorback with Assault Cannons
Fast Attack 1 - Baal Predator w/ Heavy Bolter Sponsons
Fast Attack 2 - Baal Predator w/ Heavy Bolter Sponsons
Heavy Support 1 - Predator w/ Heavy Bolter Sponsons
Heavy Support 1 - Predator w/ Heavy Bolter Sponsons
Heavy Support 1 - Predator w/ Heavy Bolter Sponsons

[Tynskel]

a lot of dakka, but I feel that you could upgrade some predators to Lascannon sponsons.

[Lemt]

You have no real way to handle Tervigons and Trygons. Or any MC for that matter.

[Wolfshade]

I would have to disagree, the highest toughness in the codex is only T6 (Carnifex/Tervigon) with a 3+ save, ok 6 wounds are tough but Lascannons/Demolisher Cannons wouldn't insta-kill and would not be overly useful against 30xT3 Termagents. Autocannons are S7, Assault Cannons S6 Rending both have a high enough S to give them an equal or better chance of wounding. Also Mephiston who has a higher I and armed with a force weapon and plasma pistol (S:7 AP2)