Snatching (Hunter) - Provides a 100% Bonus to Strike and Slashing attacks on affected mobs. Affected mobs can only be those of the flying type.
Lethargy level 1 (Wizard C1) - Provides a 100% bonus to strike when attributed.
Peltasta and Rodelero have skills (targe smash, Rim blow) that deal extra damage to frozen (Cyromancer) or petrified (Elementalist, Kabbalist) enemies.
Gae Bulg (Dragoon) - Gives a status effect to enemies that makes them take extra damage from physical attacks working well with multi hit attackers (Some archer).
Ice wall (Cryomancer) - Throws out shards when hit and likes multi hit attackers (Cyclone, Rush, Pouncing).
Decay status effect (Necromancer/Kabbalist) boosts missile damage and Pistol shot (corsair) is missile damage.
Hypothetically speaking
Lethargy + Snatching on a flying boss is 200% bonus strike damage. Slithering + High Kick is another 200%. This is a lot of strike damage to a flying enemy if you had a Hunter and a Wizard in the party.
Zaciai (Krivis) - Reduces crit resistance and boosts crit attack. 2 hand sword attribute: crit attack (highlander) increases crit attack 50%.