So uh, Command Missions...

[Fyce]

I haven't had a problem on any of those dungeons with squadrons though. Them attacking invuln targets is kind of a pain but you can solo adds so whatever.

What's up with archers and why are they so good apparently?

I'm not saying you can't do all dungeons with your squadron. But Stone Vigil is definitly the easiest and doesn't require you spamming orders all the time.
And about archers, they use Barrage with a (very) low cooldown. We are talking every 2 to 3 GCDs. This alone makes their DPS way above any other class.