I love Cutter on 3v3 games. I make my first base ALL supply pads. On Exile, I make a second base at one of the neutral bases and let that be my Barracks/reactor base.
Fort Deen and Frozen Valley I make an Elephant and 3 supply pads right off the bat and take a second base ASAP. Fort Deen I like to make 12+ Marine squads early on to take the barrier towers to delay/forewarn of an enemy rush. It's also a great way to get some nice amounts of points and supply crates early on.
From there, you have tons of cash from your first base which is all supply pads, make 4 heavy supply pads on second base, and when the time is needed for a Field Armory, simply sell a supply pad on your first base.
Tons of cash + fast teching.
I 4 shot with both my BR and my MAC.