Ability rework idea:
Tap: Create a stationary pillar of darkness (25-30m diameter?). Casting Slight of Hand while active creates a smaller bubble of darkness (10-15m diameter?). Darkness buff occurs only within created dark areas, whereas the light buff works only outside said areas. When outside dark areas, light buff operates at 50 (75?)% effectiveness.
Hold: Create a stationary pillar of light (25-30m diameter?). Casting Slight of Hand while active creates a smaller bubble of light (10-15m diameter?). Light buff occurs only within created light areas, whereas the darkness buff works only outside said areas. When outside light areas, darkness buff operates at 50 (75?)% effectiveness.
Created areas of light/darkness remain for a certain duration (20-25s?)
Tapping the ability will cancel will remove all created areas and end the ability, allowing it to be recast.
Basically, let us create our own areas of light and darkness, and make that synergise with Slight of Hand.