Get off the damn roofs on Icebreaker!

I used to play exclusively on the mid and lower levels. Now, I mostly play up top, come down for the objectives. But if someone decides to join me on one perch, I move to one of the other perches or go down below. I've had all three folks try to join me in one perch location … I guess they can't get enough hack and upload objectives … so I move to the mid and lower levels.

Some folks I run with use the tactic of one person on each of the three main perches, with one running down below to play cleanup. If I happen to be running a melee character or a close in fighter, I'll be the "goat" while the others can be the overwatch. It works. Especially on enable objectives or retrievals. On objectives, they will focus on the big critters, which tends to draw the little critters toward my teammates, leaving me mostly unhindered in doing the objectives. Also, killing big critters (other than the wave 6 Fiend on gold) doesn't cause another big critter to spawn, where shooting the little critters during an objective has the nasty effect of causing the little critters respawn near the objective I'm trying to do (this is true on all maps, not just Icebreaker).

So ... it depends. Don't cluster together. One sniper providing top cover for the rest of the team is probably enough (I do that a lot when I pug). Help with the objectives.  Don't be an idiot and get yourself killed on the perch ... if you can't survive up there, don't go up there.

I use the Krogan Engineer, the Angara Exemplar, the Angara Insurgent, the Salarian Architect, the Turian Havoc, the Human Artificer and the Human Commando with a lot of success. All but the Exemplar and Commando have pets, which help protect the character. The Exemplar's combo does an awesome job, creates a stagger point and has such a quick CD (I run him with a power efficiency booster), it's a good substitute for a pet.  The Commando's singularity and her warp are also quite effective at disabling interlopers.  I take what the map and the pug give me.

I don't play Platinum, so it's quite possible that none of this applies to a Platinum match.