While Burning, Berserking grants an additional 125%[x] damage

That's effectively 150% multiplicative damage while the effect is active.
Build Potential:

Because you're constantly taking Burning damage:

Damage-triggered effects could Diablo 4 Items activate continuously.
Barrier builds could offset the self-inflicted damage.
Low-life builds might become viable again.
Rogue Dark Shroud consumption mechanics could synergize.

This is one of the most innovative Diablo 4 Items we've seen in recent seasons. With the right synergy, Blood Mad Idol could reach S-tier status. Players looking to experiment heavily may want to buy Diablo 4 gold early to fund testing, rerolls, and Masterworking attempts.

Rust-Bitten Dirk - Boss Killer Dagger

The Rust-Bitten Dirk is a Unique dagger focused on single-target destruction.

Stats:

Damage to Close Enemies (implicit)
All Stats
Maximum Life
Attack Speed (ideal Greater Affix)
Vulnerable Damage
100%[x] increased damage to Isolated enemies

The "Isolated" condition makes this especially strong against bosses.
Best Use Cases:

Rogue builds focused on burst windows
Weapon swap setups for boss phases
Crowd-control dependent builds that struggle with boss DPS

A 100% multiplicative bonus is strong, but buy Diablo IV Items limited to isolated targets. It won't shine in dense mob content-but excels in boss fights.