Reiter3: Sustained AoE damage, retreat shot 15 = 15 targets (no +AoE ratio needed) for 10 seconds. Forward shot quick piercing burst. AoE is focused into a line (AoE is not circle/wide, but linear/line). Very strong with Krivis3 melstis. Retreat shot and forward shot might be difficult to use. Especially retreat shot.
Advantage: mobile, does not require Circling/+AoE attack ratio gear for retreat shot (main AoE skill).
Falcon1 Musketeer2: Highest Burst with Circling + Misery Snipe, medium-small AoE size with Circling Misery Snipe. Medium AoE size with Circling + Covering Fire. Has several multi-hits. Covering Fire is a high multi-hit. Musket skills suffer from weapon-swap delay heavily.
Without circling: low AoE, high low-amount-target focus.
Falcon1 Cannoneer2: High burst with Circling + Smoke grenade + Cannon Blast, large AoE size with Circling + Cannon Blast. Medium-high burst with Circling + Smoke grenade + 2x Cannonade, medium AoE size. Has 2 low CD skills (with lowish damage). Has smoke grenade as Blind CC. Bazooka mode takes very long to set-up/activate, and slow atk speed. No multi-hit besides Cannon barrage x2. Cannon skills have wind-up and after-delays.
Without Circling: still decent AoE.
ouch, that looks painful