Does special skull damage stack?

[gow]

For example, Borealis does triple damage to frozen enemies. If the enemy has hunter’s mark and is frozen, would it take 2x, 3x, or 6x skull damage from Borealis?

[igniteice]

It’s all multiplied together. Example:

Enemy has 296 health. I have 95 Attack. Enemy is burning. I did triple damage to burning enemies. That’s 285 damage. But I’m also enraged. Enraged deals 1.5x attack damage. That’s 95*1.5 = 142 * 3 (fireblade) = 426, so the enemy easily dies in one hit.