Enemy 1
Will-o-wisp (Undead)- A Will-o-wisp is a floating skull engulfed in a blue, ghostly flame. Thought to be the ghost of knights lost in the Clockworks.
Attacks - Bullet, Blue flamethrower, Flame Enlarge (Fire surrounding skull enlarges temporarily.)
Enemy 2
Will-o-wisp Knight (Undead) - A Will-o-wisp with a body, now having the ability to hold a shield and sword.
Attacks - Bullet, Blue Flamethrower, Slash, Shield, Attack Buff
1) That's not what a Will-o-wisp is.
2) What you are describing with enemy 1 is a NPC in FSC, almost exactly.
3) Enemy 2 is just the already-in-game Phantom or Almirian Crusader, but with some random, unbalanced Trojan attacks.