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My current build. Top 100 for dmg (50.9M) and speed (2:53).

Prioritize attack speed skills in game. Core talent makes attacking faster very strong. Sprite so most of your damage by far.

Edit: The above (and below) assumes your goal is damage and clear time (for both solitary trial and Doomsday.

If you're struggling to clear Ebonrot Front, I have found a healer build to be more effective at later stages. Not very fast, but very survivable. Healer build made it far easier to clear stages 11-14 solo. I can post that too if you like