More Piercing Shot testing, 07March

12:49'54.469 Atsitab Chimera Shot hits Heroic Training Dummy #3 for 5484 Nature. (Critical)
12:49'55.047 Heroic Training Dummy #3 is afflicted by Piercing Shots.
12:49'56.031 Heroic Training Dummy #3 suffers 206 Physical damage from Atsitab Piercing Shots.
12:49'57.031 Heroic Training Dummy #3 suffers 206 Physical damage from Atsitab Piercing Shots.
12:49'57.922 Heroic Training Dummy #3 suffers 205 Physical damage from Atsitab Piercing Shots.
12:49'58.953 Heroic Training Dummy #3 suffers 206 Physical damage from Atsitab Piercing Shots.
12:49'59.406 Atsitab Steady Shot hits Heroic Training Dummy #3 for 2076 Physical. (Critical)
12:50'00.000 Heroic Training Dummy #3 suffers 206 Physical damage from Atsitab Piercing Shots.
12:50'00.234 Heroic Training Dummy #3's Piercing Shots is refreshed.
12:50'01.094 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'02.281 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'03.265 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'04.156 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'05.156 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'06.281 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'07.125 Heroic Training Dummy #3 suffers 181 Physical damage from Atsitab Piercing Shots.
12:50'07.312 Atsitab Chimera Shot hits Heroic Training Dummy #3 for 5437 Nature. (Critical)
12:50'07.890 Heroic Training Dummy #3's Piercing Shots is refreshed.
12:50'08.890 Heroic Training Dummy #3 suffers 226 Physical damage from Atsitab Piercing Shots.
12:50'09.922 Heroic Training Dummy #3 suffers 227 Physical damage from Atsitab Piercing Shots.
12:50'10.937 Heroic Training Dummy #3 suffers 226 Physical damage from Atsitab Piercing Shots.
12:50'11.953 Heroic Training Dummy #3 suffers 226 Physical damage from Atsitab Piercing Shots.
12:50'12.765 Heroic Training Dummy #3 suffers 227 Physical damage from Atsitab Piercing Shots.
12:50'13.984 Heroic Training Dummy #3 suffers 227 Physical damage from Atsitab Piercing Shots.
Log trimmed to remove unnecessary shots/procs, full log here:
WWS
Piercing Shots now works as Ignite, it takes 30% of the damage of the critical Steady, Aimed and Chimera and deals it over a 8 seconds duration, once per second.
If a new critical happens while the debuff is active, it adds the new 30% critical damage with the remaining damage the debuff had and refreshes the duration, dealing (new 30% critical damage + remaining damage debuff) over the 8 seconds, once a second.
A bug however. If the debuff ticks right before the refresh (like on 12:50' on that combat log), it doesn't count that last tick to the remaining debuff damage, so we gain a "free" tick of damage. Another example (same combat log):

12:20'35.125 Atsitab Aimed Shot hits Heroic Training Dummy #2 for 3426 Physical. (Critical)
12:20'35.500 Heroic Training Dummy #2 is afflicted by Piercing Shots.
12:20'36.515 Heroic Training Dummy #2 suffers 128 Physical damage from Atsitab Piercing Shots.
12:20'37.469 Heroic Training Dummy #2 suffers 129 Physical damage from Atsitab Piercing Shots.
12:20'38.031 Atsitab Steady Shot hits Heroic Training Dummy #2 for 2170 Physical. (Critical)
12:20'38.422 Heroic Training Dummy #2 suffers 128 Physical damage from Atsitab Piercing Shots.
12:20'38.844 Heroic Training Dummy #2's Piercing Shots is refreshed.
12:20'39.781 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'40.844 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'41.828 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'42.875 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'43.828 Heroic Training Dummy #2 suffers 177 Physical damage from Atsitab Piercing Shots.
12:20'44.844 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'45.828 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
12:20'46.828 Heroic Training Dummy #2 suffers 178 Physical damage from Atsitab Piercing Shots.
The tick at 12:20'38.422 is free, it's not counted for the remaining damage on debuff when calculating the new damage.
With this "fix", Aimed, Steady and Chimera crits are worth 3 times normal damage, if my maths are correct:
ShotCritDamage= [ShotNormalDamage + (ShotCritDamageBonus * MortalShotBonus * MarkedForDeathBonus)] * PiercingShotsBonus=
[ShotNormalDamage + (ShotCritDamageBonus * 1.3 * 1.1)] * 1.3 = 3.16 * ShotNormalDamage
This should put a bigger value to crit rating and agility for MM when comparing to AP.