DamageDelves
Notes: This class have the best clear in the game while being able to deal good damage to bosses.
Knight Subclass
Stat Priority
Notes: Focus DPS
Notes: Full maxed C4 for max light, MF on mid stat and ring because what else ?
Ally and Flasks
Best magic damage ally for DPS
Death-Defying to not take one shots while clearing, Arcane for damage, Chrono to spam pots then ult
Empowered Gems
Pyrodisc is useful to clear low depths delves
Class gem is mandatory
Explosive Epilogue helps your clear I think
Berserk Battler for a maximum DPS
Every gems with CD/MD/CH. For procs, either 2MD/1CD or 2CD/1MD on each gem except cosmics, doesn't matter just take what comes but no proc in CH. For cosmics, all 3 procs on Light and MD/CD, CH on cosmics is useless.
Pyrodisc
Killing an enemy has a chance to generate a flaming disc that damages nearby enemies.
This gem has a cooldown.
Pain Freeze Class Gem
Basic Attacks now freeze enemies for 1 second on the first hit, in addition to their existing chill.
Hitting enemies three times in a row with Basic Attacks causes them to explode, taking additional damage.
Explosive Epilogue
Killing enemies causes them to explode.
\n\nThis gem has a cooldown.
Berserk Battler Cosmic Gem
Damaging enemies causes a frenzied state, adding a small increase to attack speed and Light.
Continued damage to enemies extends the frenzied state until it causes a berserk state, greatly increasing attack speed and Light.
Text
Common I think, there is maybe some mistakes or not optimal stuff but mine work very well so maybe it can guide you.