Maybe the Vigilante could be its own AT? It could do branching. For example, you can have:
The modifiers would be 1.0 for Melee, Range, and Resistance/Defense.
Ice Powers (Primary only)
1.Ice Bolt
1.Block of Ice
1.Frozen Fists
2.Frozen Armor
2.Ice Blast
2.Frost Bite
4.Chilling Embrace
4.Frost Breath
4.Ice Sword
6- Branch.
Ice Control
6. Arctic Air
8. Snow Storm
10. Shiver
12. Ice Slick
16. Infridgidate
18. Glacier
20. Stamina (Tight Build purposes)
26. Frost Work
28. Sleet
30. Freezing Rain
32. Jack Frost
35. Benumb
38. Heat Loss
(Can't think of anything else past 38)
Ice Manipulator
6. Aim
8. Freeze Ray
10. Frost
12. Ice Sword Circle
16.Build up
18. Bitter Ice Blast
20. Stamina
26. Bitter Freeze Ray
28. Freezing Touch
30. Ice Patch
32. Blizzard
35. Greater Ice Sword
38. Frozen Aura
Ice Scrapper (basically)
6.Frost
8.Hoarfrost
10. Ice Sword Circle
12. Wet Ice
16. Build Up
18. Freezing Touch
20. Stamina
26. Glacial Armor
28. Ice Patch
30. Frozen Aura
32. Greater Ice Sword
35. Energy Absorption
38. Hibernate