Pirate Barrage does more damage, but Corsair Offensive removes more stamina. The other moves depend on what you like more.

Start off by checking if you are facing a team that is more immune to freeze or stun and use the one it is more weak to, then use the other.

Board Her! / Cavenfish's Curse (Board for Ally Precision + Damage Boost + Stamina Regen, 29s, 4 CD) / (Curse for 50% chance Freeze + 50% chance Daze + 50% chance Damage Reduction, 34s, 3 CD).Pirate Barrage / Corsair Offensive (Barrage for 50 Water dmg + 25% Stamina Drain, 33s, 2 CD) / (Offensive for 35 Water dmg + 50% Stamina Drain, 30s, 2 CD).Round Rain (AoE 30 Special dmg + Freeze, 34s, 3 CD).Bullet Rain (AoE 30 Special dmg + Stun, 34s, 3 CD).Some negative effects are only a 50% chance.2 forms of AoE denial, in Freeze and Stun.

That makes it somewhat tough for an opposing monster to be immune to all of his deny tactics. Cavenfish is fairly fast for an old monster (though by modern standards he is pretty sluggish) and can AoE deny his opponents twice in a row thanks to AoE Stun and Freeze.

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