Threats: The griffons cast Spell Breaker frequently (beginning with their second or third spell), which causes casters to waste energy; the azures cast Signet of Judgment (SoJ), which causes knockdown.
Tactics: The griffons can be easily handled by strong melee parties or by spellcasting teams that can interrupt the griffons before they cast Spell Breaker. Alternatively, casters can work around the spell shield through Area of Effect (AoE) skills that target other foes or allies and/or targeting nearby allies using non-targeted skills (e.g. Wells or Point Blank Area of Effect (PBAoE) skills). The Azures are easier to work-around, either by avoiding their SoJ, interrupting it, or bringing anti-knockdown skills.