So a long time ago tilesets not increasing healing for muskets was addressed:
Continuing the discussion from Numbers for HP, heals, DMG taken, and healing rune tilesets:
But after testing myself multiple times and doing literal pixel measurements with a ruler I could not find a difference between healing while having tilesets up vs healing while not having tilesets up. One heal was in both cases exactly 3.0 cm for me. So my measurements can be off by 0.1 cm but that would be 3.3% more healing which would not make sense because the tilesets boost your damage by 30%! So unless the healing boost is lower then 4% while damage boost is 30% on tilesets I can say with certainty healing is still broken with damage boosts. This was Tested with a T14 sword in the wilds if any of those two variables have effect.
The same is the case for having Iceheart or not having Iceheart on your sword. Iceheart should increase healing by 5% just like damage, but it did not. Tested that with a T10. The 5% is harder to test though
The camera was hold perfectly stationary as close as possible against the stationary shield. So the measurements should be accurate.