Sniper Rifle. Preferably with recoil reduction and freezing bullets :p
Meet up with soldiers outside, establish where the geth are attacking from and where we can defend from.
You go outside ad talk to them only to realize they can only attack from one position
since i have only played ME1 and dont know what the smg is like, a pistol
Use biotic powers to add mass efect fields to my kinetic barriers enhancing them, go out and survey situation
You succeed [5] your sheilds will now be able to take 3 turns of full attack before breaking down.
Eviscerator Shotgun w/Warp or Armor-Piercing Ammo if allowed.
Carefully examine the site of the battle to find the best place to bottleneck the attacking Geth and see which parts need to be reinforced.
You do so and [1] realize the whole left wall can be knocked down by 1 geth (( past the long pillar on the left that can be knocked down bad roll ))
Geth pulse rifle
Upgrade the exosuit
[1] You fail and almost kill yourself before you could get the suit patched up ( -5 Hp )
Six pistols, one for each tenticle
Head outside and look for a position with a decent amount of cover for myself
You walk out of the room [5] and stumble right into the armory where you find seven robots 35 grenades and 8 crates containing parts for the robots and grenades and weapons.
300-m claymore
i try to make an awesome and lethal bayonet to my awesome and lethal weapon.
[4] You make a bayonet it may not be awesome but it sure will cut through a geth.
300-M Claymore Shotgun.
I will be looading the shotgun and headoutside inm search for cover, takeing a shot at anything that moves.
[1] You go to load the gun and the bullet blows up throwing you back. You hit your head on a pipe and are knocked unconsious (( - 10 hp. no action allowed next turn