Good idea. Your build is a healing/protecting, but also damaging so a very good combination for your needs. Now to my comment:
1. Weapon Tree: Heuksal.
From this tree you should not get all skills as not all are useful.
- Annihilating Blade Series > Not useful, all skills you get little bit later on are much better then this one.
- Fanning Spear Series > Just not needed and useless.
- Heuksal Spear Series > Can deal a nice amount on dmg and it your personal choice if you want to use it or not.
- Soul Departs Spear Series > Very good, very useful, very powerful.
- Ghost Spear Attack Series > Very good, extremely useful, pretty powerful.
- Chain Spear Attack Series > Nice combo, good in PvE combat and can be used in PvP if enemy if stun or you can do it fast.
- Flying Dragon Spear Series > Not useful for nukers, don't use it as you will have nukes.
- Cheolsam Force Series (Passive) > Get it
2. Fire Force Mastery.
Your main tree, mostly you should get everything.
- Fire Force Series > Basic skill, a must.
- Fire Shield Series > You don't use a shield.
- Flame Body Series > if you want to use your spear often, get it.
- Fire Protection Series > More magical protection, not needed.
- Fire Wall Series - For nukers, VERY useful in PvP.
- Flame Wave Series > Nuke.
- Flame Devil Force Series (Passive) > More physical damage.
3. Force Power Mastery.
Your healing skills.
- Self Heal Series > Needed... NOT!
- Force Cure Series > Needed... NOT!
- Heal Series > Healing skills, your healing skill.
- Rebirth Art Series > A MUST.
- Natural Therapy Series > Makes a very nice circle, useful for protection from mobs and helping lower lvls in training.
- Vital Spot Attack Series > Bugged and not needed.
- Force Increasing Series (Passive) > Nice passive.
4.At last, the choosing, Ice or Lightning.
- So Ice, can be resisted with enough money

. And it's effect is very useful in the beggining, but later on it will be just useless.
- Lightning, Piercing Force > Stronger Magic Attacks, Grasswalk > Faster Walking, New Nuke, Lion Shout, SOOO Lihgtning Of Course.
