[Venato Prime] build that leverages its unique passive to apply numerous stacks of Heat Status per swing.

Why use Melee Duplicate?

Melee Duplicate is a really underrated Arcane due to one major factor; the extra hits inflict their own on-hit effects and roll for their own Critical Hits and Status Applications. Because of this, combined with the stacking Status Chance bringing our total to 100%, hitting a foe with 10 stacks of Tau Status is guaranteed to inflict 4 Status Effects (200% Status Chance per hit, two hits per attack).

Why use both Molten Impact and Volcanic Edge?

Volcanic Edge provides a much-needed boost to Status Chance, coupled with the other boosts to push Status Chance over 100%. Having both mods also serves two additional purposes; Status weighting and improving the Heat DoT.

With both mods equipped, Heat makes up 59% of the weapon's damage, causing every status proc made (forced procs notwithstanding) to have a 59% chance of inflicting Heat Status. On a lucky roll against a foe with 10 stacks of Tau Status, you could inflict 4 stacks of Heat from a single swing.

As well, Heat Status' DoT accounts for Modded Heat Damage, so more Heat mods = more powerful burns.

Heat Status calculation

Modded Base DMG = 245 x (1 + 1.65) x (1 + 0.55) = 1006

Heat Proc Damage per Tick = 0.5 x 1006 x (1 + 1.5) x (1 + 0.55) x (1 + 0.8) x 4.2 = 14,735

Total DMG per Heat Status = 88,410