If I have the boots enchant "adds x-x fire if you've killed recently", will it affect the Explosive Arrow explosion?
Yes. The damage is not limited to attacks and/or spells, so will apply to all hits of damage.
What are the stats of the minion generated by the "Of Reflection" glove enchantments?
It's a Clone, working the same as ones from Blink/Mirror arrow. Exact stats depend on the level of the skill and are too much detail for me to list here.
For skills on glove enchants: do I get increased damage from sulfur flasks? Is the AoE increased from passives? Do I +1 base crit chance from the Assassin subclass?
Yes, Yes, Yes. The explosions are caused by you and use your stats. The skills are just like any other skills, and you can check them in the character panel to see things apply.
Character (using Voll's Protector, Commandment of Frost enchantment on gloves) perform default attack on undamaged low level mob, rolls crit, do damage equal or higher than 90% mob's life pool (crit stri... Read more

What's the official name for Ascendancy abilities such as Headsman and Paragon of Calamity? They don't seem like Keystones, but they are also more significant than Notables.
Technically, they are Notables, although since you can't socket an Inspired Learning jewel near them, this doesn't matter mechanically. I'm not aware of any other specific name for them.
Slayer
Are the Slayer's Headsman bonuses to area of effect radius and damage multiplier on kill treated as buffs and will they be scaled by Ichimonji's increased buff effect?
No. Buffs can be identified by having a visible icon with a green border. Anything without that icon or with a different border is not a buff.
Is the Slayer's Headsman passive supposed to prevent on kill effects from curses like Poacher's Mark, Assassin's Mark, and Warlord's Mark?
No. It does not do this and is not intended to. I don't understand why you think it would be?
Relation between Bane of Legends and Endless Hunger in the Slayer tree. Say I do 100%... Read more

Why is Elemental Overload worded to only work with players and not totems?
It's worded that way because that's what it does, and having the wording say something else would be problematic.
I can tell you how it does work (you need to crit something, so your totems critting something won't cut it, but once active, since totems use your skills, they benefit from it), but not why that decision was made.
How exactly does weapon flat damage interact with passives? Does it calculate from the total weapon damage or from the affix and base weapon damage, and then gets amplified by the weapon mod?
All local modifiers on a weapon contribute to that weapon's damage, which can be seen on the item. This total is what you get as base damage for equipping the weapon, to which your modifiers apply.
If I choose the Shamanistic Fury passive node (24% increased Totem Damage) does that help to counteract the penalty of reduced damage when using Summon Skeletons on a spell totem?
No. The bonus is "incre... Read more

Does Hypothermia's more damage affect Vortex's DoT?
No. Conditional modifiers cannot apply to DoT, because the condition could change during the DoT.
Rapid Decay: Can you clarify in which cases the gem actually works? I heard rumors that it does not apply to Righteous Fire, since its not technically a duration gem. However it will apply to Righteous Fire if it's linked with Spell Totem, because that makes it duration. Why is this?
You answered your own question here - because it's now a duration skill, and Rapid Decay only supports duration skills.
Follow-up question: does Rapid Decay work if I link it to a bow Skill (lets say Lightning Arrow - Greater Multiple Projectiles - Pierce - Void Manipulation - Rapid Decay) and I use Snakebite to apply poison. Will Rapid Decay (and Void Manipulation for that matter) work with the poison indirectly applied through Snakebite?
Rapid Decay only supports duration skills.
Would Rapid Decay increase a DoT damage caused by Ancestral Warchief?
Assum... Read more

Does Arctic Armour reduce reflected fire damage (assuming you are standing still of course)?
Yes.
Vortex's Damage over Time tooltip doesn't benefit from +damage to spells (Herald of Ice etc), and also cannot have its element converted. Is that the actual functionality and/or is that intended?
This is true of all damage over time, and always has been. Flat added damage only makes sense for hits, and damage conversion cannot apply to damage over time (although that one might be able to change in the distant future).
Vortex seems to chill even if it's connected to Elemental Focus. According to the Wiki it shouldn't (Wiki: "The drawback of this gem will override all elemental-status-inflicting effects of the supported skill or passive skills, as well as buffs such as Elemental Conflux.").
Vortex (the skill) will not chill with it's cold damage while affected by this support. The ground effect it leaves behind is a spearate thing that happens to apply chill, but is not the skill applying... Read more

Hey, I had a question about Daresso's Passion: "X% Increased Damage while you have no frenzy charges"

Is that modifier local or global?
Global.
I have an issue with pierce chance from the Drillneck quiver. It is supposed to give "10% chance of Arrows piercing" but it doesnt increase the chance to pierce, that is indicated by the tooltip of my Lightning Arrow.
Skill Tooltips intentionally only show the stats that are specific to that skill. They don't show global things that affect all skills.
If you want to see everything a skill does, including all your global stats, the character panel, not the skill popup, is the place to do that.
With the "Projectile damage increased by arrow pierce chance" mod on Drillneck, is there any way to achieve more than 100% increased projectile damage? Same question regarding "critical strike chance increased by arrow pierce chance" node from the Deadeye ascendancy.
No. The chance to pierce cannot be higher than 100%.
Assume I equip Drillneck and hit a... Read more

This is the Gameplay Compendium, a collection of Mark's answers from this thread, organised into handy sections for your convenience!
This thread will be updated regularly with new answers, so if you'd like to have your gameplay question answered by a developer, head over to the Mechanical Questions Thread!
Contents→ Unique Items→ Active Skill Gems→ Support Skills Gems→ Passive Skill Tree→ Ascendancy Class Passive Skills→ Enchantments→ Jewels→ Modifiers→ Prophecies→ Miscellaneous→ Future Plans and Development Decisions
Updated as at 02/07/2018
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