- Specialize in Skeletal Mage and level it up, assigning points as you desire.
- Put a point in Archmage, then summon it.
- Remove the point in Archmage.
- Level the skill back up one level to get your point back.
- Summon one fewer than your maximum Skeletal Mages (ex: If your max is 5, summon 4).
- You have one Archmage and four regular Mages. This can be confirmed by the size, and by mousing over the Archmage to see its name.
This is very easy to abuse since it only requires dropping a single point.