I underlined the most important!
1. Heuksal, Fire, Cold = LVL100 (Spear)
2. Heuksal, Light, Cold = LVL100 (Spear)
3. Bicheon, Fire, Cold = LVL100 (S/S)
4. Bicheon, Light, Cold = LVL100 (S/S)
(Rated from the top, 1 give the most damage and 4 the least. Do not underestimate 3 and 4 though. They also do alot of damage.)
There you go, a spear nuker does more damage but a s/s nuker have much more defence cause of the shield. So in my opinion, go for s/s it's worth it.
When your snow shield run out if you use spear you will take alot more damage so to make up for that you need really good gear. With S/S you dont have to have that good gear as you got a shield.
What gear should i use? Protector. Why? Cause it's very balanced of mag / phy def.
I know that snow shield don't excist in SunWorld yet, it will be added though so just relax and wait for it.