Well, this is what I did.
Level 120: 1 Blizzard, 2 Maple Warrior
Levels 121-126: 3 Maple Warrior
Levels 127-135: 3 Blizzard
Level 136: 2 Blizzard, 1 Chain Lightning
Levels 137-145: 3 Chain Lightning
Level 146: 2 Chain Lightning, 1 Ice Demon
Basically after this, it’s you improvising. Ice Demon next is not a must but it depends on what you prefer. Also, skill points for the levels after this depend on your funding as well as your time.
Im pretty sure that you have to do Blizzard first or Chain lightning first. It dosent matter.