[Sandman]

Battle-Mage 1:

Base commander cost: 30
Holy-2: 60
Astral-1: 30
Linked randoms-2: 60

Total: 180

It's better mage-priest than the Witch Hunter, although not as good as the (exceptionally good value) Theurg. 180 might be a bit high, particularly if the nation has a magical focus. Linked randoms are very good though.

Wee low level mage:

Base commander cost: 30
Holy-1: 20
Astral-1: 30
Random-1: 30

Total: 110

The mage is essentially identical to the Master of the Way, who costs 100 gold, although I could've sworn he used to be 110.

Arch mage:

Base commander cost: 30
Holy-3: 140
Astral-3: 120
Air-1: 30
Fire-1: 30
Linked randoms: 60

Total: 410

30 more than the Grand Theurg, who has the same level of holy magic and same number of magic picks. You could knock off 30 as a capital only bonus. Again, there's a question mark over the cost of the linked randoms.