In that case keep the gliscor set but chage the ability to the dream world ability Poison Heal as it heals 12.5% every turn. Why don't you try a chandelure? A fairly decent set would be
Chadelure @ Choice Scarf
Modest 252Spd 252SpA 4HP
Flash Fire (You could use shadow tag as the ability if you want but its kinda gay)
Energy Ball
Fire Blast(Flamethrower)
Shadow Ball
Psychic
Unfortunately you wont be able to switch moves with this set but chandelure has a Sub-par Speed Stat, so it needs the boost from Choice Scarf
Chadelure @ Choice Scarf
Modest 252Spd 252SpA 4HP
Flash Fire (You could use shadow tag as the ability if you want but its kinda gay)
Energy Ball
Fire Blast(Flamethrower)
Shadow Ball
Psychic
Unfortunately you wont be able to switch moves with this set but chandelure has a Sub-par Speed Stat, so it needs the boost from Choice Scarf