How i see it, if barrage is combined with sidewinder that is a huge huge burst dps. If barrage works like we think it does thats a potential 350 potency x 3 (so like 1050?) + buffs + wanderer's. Im thinking rotation could look like this

Precast Wanderer's and all buffs (straight shot included), DoT > OGCD > Dot > OGCD > Empyreal Arrow > Barrage > Sidewinder > Heavy shot spam with OGCD like bloodletter/Blunt Arrow / Repelling shot > If dots are about to fall off or if you want to clip buffs, Iron Jaw > Back to heavy shot.

this is pure speculation o3ob