questions nid some answers for a pure str glaive type. . .

[Chibib0]

Well am . . . Im a glaive type nd pure str,
I pick cold and lightning mastery. . . most on cold. . .
Im lvl 19 nd i put my SP to cold, heuksal, nd some on lightning. . .
I want to be a succesful pure str, glaive type. . .

On cold I pick the ff:(Lvl 17)
The cold armor
Ice river lvl7
cold wave lvl1
weak guard lvl2

On lightning I pick the ff:(lvl 12)
Thunder tiger lvl4
Must piercing lvl2
Grass walk lvl1
Heavens force lvl1

Questions:( Pls indicate the question # before answering) (Pls answer in specific)
1. Do i hav to change some?
2. Do i hav to pick some fire skills? wat are the ff? List it down. . .
3. Do i hav to continue mastering thundertiger not the ice river or not both ?
4. Do i hav to continue the ff. nd add some fire skills? list the following fire skills that i hav to master. . .
5. Do i hav to cancel mastering some of my skills? wat are ff?

Tnx guys! hope I for ur help!