Best solution I've found for Dark Ghost is MA Ancient Mariner.
Not having Cosmic Lillith has hamstrung me when it comes to stuns but the best I've come up with is

DRE - Apoc/Bespoke
Nightmoon - Light/Alchemy
MA Mariner - Envious/Bespoke
Sniper - Rag/Bespoke.

Not great at ~3 minutes but until I can be bothered to do some more tinkering it's the best I'm gonna get