A2R3 is a solid min/max set-up since you have steady aim 15, and swift step crit rate booster. If you aim for Earth Tower, you will need to specialize for AoE (thus you won’t be great at bosses - don’t expect fletcher level of bossing).
AoE:
->SR2. The best skill of SR2 is retreat shot, other skills are less good. Retreat shot requires a wall to reach full potential. Great skill for Earth tower AoE, however it will be your only good AoE skill. Strongest when retreat shot is extended by krivis3 melstis. Doesn’t need AoE gear because retreat shot hits a fixed amount of targets (skill level = amount of targets).
->falconer -> cannoneer. Great AoE burst through circling + multishot, circling + cannonblast, circling + barrage. Will rely on circling and +AoE attack ratio gear a lot.
->Rogue -> falconer. Another AoE burst. Circling + multishot, circling + feint&barrage. Difficult to use sneak hit without werewolf card. Feint has a small AoE. Relies on Circling and +AoE attack ratio.
-> falconer -> archer3. Circling + multishot 15, Circling + barrage. Relies on Circling and AoE gear.
Note: the added benefit of circling is party-support. It applies to your party member skills too. Falconer is picked solely for Circling (+Call), the other skills are bad.
Keep in mind your r8 choices.
SR2 will likely go SR3 at rank8.
Musket1->musket2.
Cannon1->cannon2.
The other choices may pick mergen or hakkapalle. However some rogue skills can’t be used when mounted (only sneak hit may be used on mount), and NO falcon skills when mounted.
Example of earthtower A2R3 SR2 + krivis3 melstis, however we can’t attack+retreat shot anymore.