Correct, with the exception of conversion from active skill gems, which applies first.
If you had a gem that does 50% lightning built in, alongside having 100% cold and 100% fire, your total damage would be 50 lightning, 25 fire, 25 cold. If the gem has 100% lightning innately, you'd do 100 lightning, 0 fire, 0 cold.
Conversion from skills has priority - this includes both skill and support gems. Otherwise this is correct.
The only distinction is between conversion from the skill vs conversion that's from the player/monster who's skill it is.
which might actually be true. But it does not say, whether the debuff is assigned a hit.
Maybe /u/Mark_GGG can answer this: Is the explosion caused by the fuse debuff of exploding arrow counted as a hit by the player (i.e., do on hit effects like raiders generic "frenzy charge on hit" trigger?) or a hit by the debuff? If the answer is "player", is this because a debuff is not an entity that can be assigned a hit?
Maybe /u/Mark_GGG can answer this: Is the explosion caused by the fuse debuff of exploding arrow counted as a hit by the player
Yes
If the answer is "player", is this because a debuff is not an entity that can be assigned a hit?
Not really - a debuff is fundamentally not a game object and can't hit things, but even if it could that wouldn't be what's happening here. The damage is directly caused by your skill which you used.
Hey Mark can boneshatter self damage crit if you are wearing a legacy reckless defense which has the line +x % additional Chance to receive a Critical Strike
No, it would need to force a crit, not rely on the chance - the crit roll for that damage is zero.
This actually means it will always crit in this case, which is not intended, and it will be changed to make a crit roll such that it can interact with stuff adding a crit chance in an intuitive and sensible way in future.
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