Sunder + Melee Physical Damage Support Question

hi, im still new to the game and i have a question about a skill combination.

im using sunder for my main attack skill.
i have melee physical damage support in the weapon.


sunder slams the ground, creates a wave of broken ground that damages enemies.

then sunder has a secondary attack that creates a circular shockwave when hittting mobs.

my question is this,

does melee physical damage support add the melee damage to both the initial slam, and the secondary attack with the circular shockwave, or does the melee physical damage support only affect the initial attack?

thanks for any help.

Sunder's secondary attack is based on the damage of the initial hit. If you link melee physical damage to sunder, the damage of both the initial hit and the secondary aoe will go up, but the melee physical will not double dip.

If your melee physical damage is level 1 (30% more) and you hit for 100 physical damage without melee physical, the damage would be:
initial hit = 100 x 1.3 = 130 damage
secondary aoe = 130 x .7 = 91 damage