Melee attack = attacker will be staggered when blocked
Ranged attack = attacker will not be staggered when blocked
In general, higher priority beats lower, Melee beats Ranged if same priority.
attack with Low
priority -- most Brv attacks
attack with Mid
priority -- cause stagger on normal R block
attack with High
priority -- cause Guard Crush on normal R block, most HP attacks
-- Special case of ranged attacks, can not be blocked, but dies to attacks and dashes
-- does not collide/touch other attacks/blocks at all.
-- include Quickmoves and any dashes
priority -- attacks with magic guard such as Fated Circle, Dark Cannon, WoL and Tidus' Ex mode bonus
priority -- Normal R block, Shield of Light, Delta Attack, Shield Bash etc
priority -- Normal R block with Precision Block activated
priority -- [Wrath] Particle Beam, EX Mode (SW) Sword & Shield, Deus Iratus.
priority -- Omni Block, Charged Knight's Spear, Lv2 Assist Change
= (win) cause stagger/guard crush on opponent's melee hits/block, reflect opponent's projectile
= (draw) weapon clash on melee hits, projectiles deflect (target not change)
= (lose) opposite to O
= (stagger) both stagger, reflect projectile (target change)
= (ignore) if both are ranged attacks, they passes through each other (eg, two Emperor's Flares); if either is a melee attack or block, the ranged one wins