Suggestion: Dark Arts doing more than potency increase.
With the information on DRK's skillset in 4.0, the class is looking to become very visually plain. Essentially WAR 3.0 levels of plain.
How to combat this? What if... Stay with me here, What if:
Dark Arts changed the animation of certain skills. Specifically to recycle our lost Scourge and Delirium.
So for example, Dark Arts Syphon Strike would utilize the beloved Scourge animation and Dark Arts Soul Eater would use it's current animation(with base Soul Eater being Delirium visually).
The two skills in their non DA'ed form would have the blue particles and when Dark Arts would both be red, possibly to indicate the skill had been buffed in output. Cuz y'know Red = Angry and Angry = Damage.
We could take this further with other Dark Arts-able skills such as Dark Mind. The weaker version has the soft shroud and the upgraded version could recycle the lost Shadowskin animation with the hard looking barrier to indicate an upgrade in defense bonus!
Something something stealth bring back scourge or riot something something didn't want to play Darkrrior co-staring Fell Spiller something something.