[idurus]

@idurus, I corrected the ground target skills. At first glance I would say Plunge needs to have a "Previous Combo Skill" set to 3624 to prevent any weird double casting scenarios. I don't have a 60 DRK so I can't easily test that.

1) Ground Target work perfect now.

2) Previous Combo Skill for chains not solve the problem. Chain not work, unfortunately.
The same issue with Dark Arts -> Abyssal Drain\Dark Passanger

Avoid this problem by through away chains but problem with chains still here.

3) About Previous Skill ID NOT:

Combo: Syphon Strike -> Dark Arts[ if mp>50%] -> Souleater [if we have DA buff ] or Delirium [if we have no DA buff]. Sometimes after Dark Arts character using Delirium instead Souleater.
Same situation with save CDs. Сharacter uses multiple CDs even if written to use them provided that no other CDs.
In old skillmanager i can enter CDs ID numbers into Previous Skill ID NOT for other CDs or Dark Arts ID into Delirium and problem solved.

Avoid by changing mana checks for skills. But not perfect decision.