I am a begginer nuker (no nukes yet) at lvl 23, with my highest mastery Cold at 20.
These are my masteries:
Bicheon-19, Heuksal-14, Pacheon-10, Cold-20, Light-12, Fire-13, Force-17
I know I kinda screwded up my char by getting 10 pacheon, but I thought killing Archers and bowmans at lv 12-14 would be to hard w/o bow

As you can see, I have all passives from every skill, but I'm planning on maxing 3 masteries, preferably Bicheon Cold and Light at 80, though I don't know what should be my other masteries. I will delevel pacheon to 0.
I thought about this(levels according to masteries "heuksal/fire/force"): 60/0/0 30/13/17 30/0/30 40/0/20
Those are 4 builds I thought for myself.
17 Force for Respawn, and Healing skills look nice too, but I'm not sure should I leave Fire at 13, or delevel it and get force up until 30, or Heuksal up to 40 and Force to 20. I'm not sure about deleveling Force and Fire, so I can get Heuksal's HP passive maxed (6 max?).
Also, I'm increasing my gap from lvl 20, and as you can see it is 3 now, but I will reach 9 gap at lvl 29 and I think I'm gonna farm until lv 40+ or so.
By the way, I'm doing every single quest, every skipped exp is lost exp

Any advice is very thankful and welcome. Thanks in advance.
P.S.
Please excuse my grammar errors, I'm not english.