Air Savant enhancements

Tier One
Requires Air Savant, Sorcerer level 1

Tier Two
Requires Sorcerer Level 2, 5 APs spent on tree

Tier Three
Requires Sorcerer Level 3, 10 APs spent on tree

Tier Four
Requires Sorcerer Level 4, 20 points spent on tree

Tier Five
Requires Sorcerer Level 5, Character Level 12, 30 APs spent in tree