Battle Engineer enhancements

Tier One
Requires Battle Engineer, Artificer level 1

Tier Two
Requires Artificer Level 2, 5 APs spent in tree

Tier Three
Requires Artificer Level 3, 10 APs spent in tree

Tier Four
Requires Artificer Level 4, 20 APs spent in tree

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