Commentary: Reaper has the most mp usage in terms of skill use or amplification, in certain skills it doesn't make much sense using mp or it's costing to much than to its use. Most of her skill kit resembles Askeia or other class with stealth skills, but in a worst state or underperform.
Shadow Slash resembles Askeia's skill Shadow Step, but has a worse feature of having huge mana requirement for the flow, they're just doing the same thing only Reaper having the worse of it. Nightmare as a stealth skill has too short time frame for any stealth capabilities and doesn't make much sense specially in field pvp or utilizing it as a escape/mobility skill, can't dodge when stealthed and most often being catch immediately after casting. Death Circus is a slow unrealiable form of damage hence it is mostly use for re-positioning, but still mostly unreliable since the travel distance is too short and the movement is too slow, the only good thing about it is prolonging your SA rotation. Grim Reaper as a buff skill needs mp to activate!?
Suggestion:
*Shadow Slash
- reduce mp requiement from 70 to 20 to perform flow
- allow instant activation
*Nightmare
- increase stealth duration from 3 to 6 sec
- add Super Armor for 3 sec during stealth (not applied in arena)
*Death Circus
- improve skill perfomace as same to Titan's Raging Thunder skill for better travel distance
- or can be re-work as same to Yacha's Collapsing Sweep skill for a short frame - effective repositioning skill
*Soul Spike
- add a cannot be grab feature during the skill
*Grim Reaper
- remove mp requirment activate the skill
*Rift Slicer
- for this skill, it's only a suggestion and not much of a need but it would be great if she can move/strafe during each slice animation just like Phantasma's Supernova.