The Walking Tank (N7 Destroyer build)

I noticed there's only two Destroyer builds up; one that doesn't use the Hawk Missile Launcher, and one that doesn't use Multifrags, so I put this up because I use both.

Build link

Devastator mode: take accuracy, magazine size and max shields. Accuracy because even though the Typhoon is accurate as hell, this will allow for longer range shooting as it keeps the spread smaller. Magazine size so you can shoot for longer before a reload is required (with this build, the Typhoon I and my ammo capacity my mags hold 175 rounds). Max shields is to offset the shield cut done by the Hawk.

Missile Launcher: damage and force, refire time, Hydra Missiles. Damage and force for a needed boost, refire time to pump them out more often, and Hydras instead of Cobras, which I'll explain later.

Multifrag Grenades: force and damage, force and damage, grenade count. The two force/damages for a massive boost, and grenade count so you can launch 5 instead of 3, which will help a lot in close quarters.

T5-V Battlesuit: weapon damage, power damage. Weapons because you don't need to worry about recharge times, and power to boost your grenades and missiles, and with the Typhoon headshots are difficult unless you've got good aim.

Weapon: as stated, the Typhoon with the stability dampener and ammo capacity

Gear: I use the Warfighter Package V, as it gives a 12% bonus to Assault Rifles and 2 extra grenades, but nade spammers may choose to go with Grenade Capacity. Up to you.

As soon as the match starts, activate both Devastator mode and your Missile Launcher (be sure to grab some ammo as your mag size will increase when Devastator is turned on, allowing you to grab more). Your Hydras will save your arse more than you can count. The reason I chose Hydras over Cobras is because even with the papas decrease, they'll still stagger most mooks (they stagger Marauders, I know that much), and with 3 of them, the total damage output is higher than 1 Cobra, so if they all hit the one target they'll do a shit ton of damage. Because the Typhoon has ramping fire, sometimes CQC can get hairy. Your missile/s will stagger the bad guy, allowing time for you to reach full-auto. The refire time boost will give another stagger if you don't kill him in under 3 seconds.
The Multifrags have a force of 2050N, which is higher than the stagger threshold for everything, so anything more is unnecessary. Rank 5 force/damage was taken purely for a damage increase. When surrounded by enemies or about to cop a Brute charge, launch them and they'll stagger everything and hurt a lot, allowing you to a) shoot them dead, b) launch more grenades for some 'splosion kills, and c) stop the charging Brute. At long ranges the grenades aren't too great as they arc out and don't aim very well.

That's pretty much it. Walk around and/or camp shooting everything that moves until it dies. With armour piercing rounds, you'll kill a Gold level Brute with one magazine fairly easily. When you walk around the corner and face down 3-4 enemies, you've hit the jackpot as your Hydras will fan out and hit individual targets, staggering then all, allowing for some quick and easy Typhoon brutality.