Originally Posted by
Dracodraco
You'll start by precasting aimed shot (if without 4 set), then casting Barrage instantly in combat (as it's the highest priority move you'll have available - no marked shot off the bat), hope Marking procs, use Sidewinders to regain barrage focus (and get a charge recharging), then you'll either be using Marked shot (if you got a Marking proc of your first sidewinder), or Aimed shot (to burn off focus), and at that point you just keep following the priority in the guide.
Unsure if you should cast an aimed shot even with 4 set to burn more focus than just barrage, though.