Gotta do three Perfect Slices in a row with perfect timing. Good Job, here a 900k DoT. Oh you play Rogue/Scout? Ok you get 1.5kk DoT but don't mess up the timing with your 1.5 second Channel skill that misses anyway.
In all seriousness, the DoT damage does not reflect the effort of aquiring the DoT. There are other Classes who do 1 single attack and get 20kk DoTs.
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I wanna come back to this post and just further illustrate my point. Here is a scrut of Warrior/Champ doing organs within ~30 secs (no SA from pt).
https://gyazo.com/7f05efa03197f6ff7862fc380c2ad6c2
In comparison, Perfect Slice after skillfull timing and three hits does maybe 1-2kk dps and you can only do it on one target at the same time.
Also with the introduction of the new dagger there is 0 reason to play with Katana anymore.
Right now I do around ~10% more dps with Katana (if I hit all Perfect Slices) over 2x Dagger for non-offhand based classes like Rogue/Warden, Rogue/Priest in singletarget. I think this is a fair dmgboost considering the skill and risk needed to play with Katana.
With the offhand elemental boost + patk you will do the same and require less skill and no luck. You have very low aggro in burst, higher precision for classes like Rogue/Bard in Dark Core and can use this Dagger for other classes like Scout/Rogue and Bard/Rogue.
Suggestions:
Restore the ~10% dps advantage for skillfull gameplay and look deeper into the bleed damage especially comparing it to other bleeds.