Generally speaking, it would be fitting to have a few wizards for this kind of tower defense game.
However, although Dean McKenzie has a wizard template at his disposal, he can't extract any spirit, rendering the wizard template useless.
Moreover, a level 20 wizard doesn't have any area-of-effect attacks, which means it might not be as useful as an archer.
This is the reason why Dean McKenzie invested two-thirds of his forces into Skeleton Archers.
As Dean McKenzie spent 31 gold coins, the combat capabilities of the 62 skeletons skyrocketed, resulting in significant changes in their attributes.
...
Name: Bone Hardening Skeleton Warrior
Template: Elite
Attributes:
Strength: 6.6, Agility: 4.7, Physique: 10.6
Attack: 8.6 (5)
Defense: 5.2 (10.6)
Skill: Bone Hardening (Level 1) Passive increase in defense, 1 Physique point increases 1 Defense point
Equipment: Skeleton Longsword (Level 20) (Common) (Attack Increase by 5)
...
Name: Accurate Skeleton Archer