Build Version
0.7.10c … now available “Increased Smelters Wrath Damage affix” rolling on sentinel helmets / body armors.
0.7.10b … 1st Ver.
Video: (at level 78, in 0.7.10b)
0:00 farming lvl 100 area.
1:39 lvl 100 Rahyeh battle.
Main skill (in 0.7.10c)
Smelter’s Wrath (4 k～200k dmg / crit hit) in LV 100 area, depends on ignite stack.
Smelter’s Explosion Build Guide (Beta 0.7.10b)
pros/cons
・pros
High Single-Damage and AoE
・cons
Slow farming speed caused by Smelter’s channeling time.
Sometimes, killed before bursting skill.
Need a lot of unique gears and Idols.
Unique gear / Idols
1 : Sunforged Hammer
Items - Last Epoch Item Database
2 : Maehlin’s Hubris
Maehlin's Hubris - Unique Engraved Gauntlets - Gloves - Last Epoch Item Database
3 : Suloron’s Step
Suloron's Step - Unique Brigandine Boots - Boots - Last Epoch Item Database
4 : Woven Flesh
Woven Flesh - Unique Gladiator Armor - Body Armour - Last Epoch Item Database
or Titan Heart (If you have enough life leech)
Titan Heart - Unique Copper Plate - Body Armour - Last Epoch Item Database
And needing Ornate Solar idols having bleed or ignite chance,
I think it is better 200 % or more total ignite chance.
If you do not have bleed / ignite idols, it is useful smelter’s might node on forge guard passive tree. It can generate 28 % ignite chance / point, if equipping 2-Hand weapon and Maehlin’s hubris, in fact.
Synergy / Explanation
Sunforged hammer can deal 40 - 70 % more damage against ignited enemies.
Smelter’s wrath’s Valiance node can 60 % more damage against rare or unique enemies.
Same, Tempering blow node can deal 15 % more damage / ignite stack. (up to 150 %)
It’s most important to take advantage of Tempering blow node.
There is 3 methods for gaining max stack ignite if having Maehlin’s Hubris unique gloves.
1 Combining Manifest armor’s Iron grasp and Sharpend metal nodes, it can generate 6 x ignite / manifest armor’s melee hit. This is not so useful on map farming, but very useful on boss battle because it can reach to max ignite stack, only 2 hits.
2 Shield Bash’s Serrating Strikes node can generate 5 x ignite / hit.
If take Incinerating blow node, it can generate 8 x ignite / hit, but Stun is very powerful, so I’d recommend leaving Stan chance.
3 Devouring orbs Hit can cause ignite if you have bleed / ignite chance from passive, idols.
Therefore, if you having 200 % or more ignite chance, it is easy to keep maximum ignite stack for Tempering blow node by combining this 3 methods.
Stats (at level 87)
Non Buff
※Gain 30 % additional physical resistance from passive tree if you have been hit recently.
Current gears
Amulet and Relic ;
It is important to craft “increased damage while channeling” because it increase Melee and physical and Fire damage at same. Also, “critical multiplier” is important.
Rings :
Crafting “increased fire / elemental damage” may be generate more damage, but in fact, including base type, I think any rings is fine in rings slot.
Helmet and body armor :
Crafting “Increased Smelters Wrath Damage affix” and “Melee physical damage if wielding a mace” may be generate greater damage 
if you have enough shards.
Passive tree (at Level 87)
Sentinel
Void Knight
Learning Devouring orb early is very useful if you can have 100 % or more bleed/ignite chance from idols.
Forge Guard
Paladin
Blessing
The Black Sun (LV68-100)
(Grand) Emptiness of Ash
Grand Emptiness of Ash - Blessing - Last Epoch Item Database
End of the storm (LV80 - 100)
(Grand) Light of the Moon
Grand Light of the Moon - Blessing - Last Epoch Item Database
or (Grand) Rhythm of the Tide
Grand Rhythm of the Tide - Blessing - Last Epoch Item Database
Reign of Dragons (LV100)
Hemmorage of Marrow
Hemmorage of Marrow - Blessing - Last Epoch Item Database
or Cruelty of Strength
Cruelty of Strength - Blessing - Last Epoch Item Database
Active skills
1 Smelter’s wrath (main skill)
Backdraft node provides enough AoE.
2 Devouring orb (for ignite stack, in farming)
3 Manifest Armor (for ignite stack, in boss battle)
4 Shield Bash (for ignite stack, stun enemies)
5 Shield Rush (for movement)
Thank you for your interest !
