Tested using lady geists malice.
Headshot booster does flat 40 bonus damage which is not amplified. This also affects mystic burst.
first image is damage with headshot booster second picture with it on cooldown.
Cold front damage is amplified.
items tested
damage amplified:
withering whip, torment pulse, cold front, mystic shot
damage not amplified:
headshot booster, headhunter, mystic burst, improved burst
Not sure if this is intended behaviour or a bug with the items. I couldn't find any mention of this anywhere. Tested headshot booster with infernus too and the damage was not amplified.
Headshot booster does flat 40 bonus damage which is not amplified. This also affects mystic burst.
first image is damage with headshot booster second picture with it on cooldown.
Cold front damage is amplified.
items tested
damage amplified:
withering whip, torment pulse, cold front, mystic shot
damage not amplified:
headshot booster, headhunter, mystic burst, improved burst
Not sure if this is intended behaviour or a bug with the items. I couldn't find any mention of this anywhere. Tested headshot booster with infernus too and the damage was not amplified.