Vitality Mastery – Adds MaxHP +
Mana Mastery – Adds MaxMP
Sharp eyes - Adds ATK rate
Reflex - Adds Def rate
Defensive Sense - Adds Def +
Offensive Sense - Adds ATK +
Force Control - Adds MATK
Eyes of Mind - Adds ATK rate
Sixth Sense - Adds Def rate +
Damage Absorb - Adds Def+
Impact Control - Adds ATK +
Ruling Force - Adds MATK

PVP Upgrades: Vitality Mastery, Defensive sense, Offensive sense, Damage absorb, Impact control and Sixth sense.

PVE Upgrades: Vitality Mastery, Reflex, Offensive sense, Sixth sense, Damage absorb, Impact control

Stats after Upgrading the skills:

Although FBs don't do much damage, their skills have additional effects such as lower enemy's defense, attack, and deal damage overtime (which is really useful).

Generally, skills that are worth keeping in high levels are:

Sword:

Assassinate(lvl9 or 12)
Infernal Impact (lvl9 or 12)
Abyssal Crystal (lvl20)
Infernal Stigma (lvl18/19/20)
Force Assault (lvl20)
Dance of Ruin (lvl20)
Force Slash (lvl20)
Dash (lvl9)
Fade step (lvl9)

Magic:

*all lvl 20 but there might not be enough points, so lower some skills that you don't use often

Hard Luck
Field of Enervation
Field of Execration
Mana Freeze
Lightning Canon
Wind Canon
Aqua Canon
Stone Canon
Lightning Blade
Aqua Vitality
Wind Movement
Earth Guard
Lower Defense (optional)
Blind (optional)
Enervation (optional)
Execration (optional)
Ice Blade when you reach lvl 140 *Lightning and Ice Blade can be stacked once you have done the lvl140 class rank up quest
Fire Blade when you reach lvl 170 *Lightning, Ice Blade and Fire Blade can be stacked together once you have done the lvl170 class rank up quest

PVP:

Force Assault > Force Slash > Assassinate > Force Assault > Force Slash > Dance of Ruin / Crystal > Infernal Impact (as finisher)

_ _ _ _ _ _ _

or

Force Assault > Force Slash > Assassinate > Infernal Impact > Dance of Ruin / Crystal > Assassinate

_ _ _ _ _ _

DO NOT use long cast time skills like Force Impact or Infernal Stigma because they greatly reduce you DPS!

PVE:

Stigma(to stun) > Assassinate > Infernal Impact > Dance > Assassinate

_ _ _ _

(for this combo assassinate and infernal impact must be lvl9)

After you complete your level 20 test, you will obtain Battle Aura. Battle Aura has 6 aura codes, ranging from Water, Ice, Fire, Lightning, Earth and Wind.
There is no known stat difference between the Aura Codes for CabalSEA, so just choose the graphical appearance you prefer.

Aura Mode

Aura Mode adds ATK, MATK, Def, Def rate, Atk rate, Crit rate, Crit damage and HP restore.

1. Battle Aura can be stacked onto Battle Mode 1 and Battle Mode 2 later.
2. Battle Aura is the only power up that can combo with shooting star
3. Battle Aura is the only mode that adds crit rate and crit damage.
4. Combo can only be used after a certain rank is achieved.

Battle Mode 1

Force Enchanter, probably one of the strongest BM1 among all characters. Besides having stats bonus like Battle Aura and BM2, if you have the following canons: Aqua, Stone, Wind and Lightning, they will automatically be casted as your Aqua Vitality, Earth Guard, Wind Movement and Lightning Blade.

These new buffs are not the same as your 4 regular buffs, instead they give a heck lot more bonus attributes, like Aqua Canon (Aqua Vitality) gives 1000++ HP/MP, Stone Canon (Earth Guard) gives 200++ Def, Lightning Canon (Lightning Blade) gives 200++ Att and well over 1000++ Def Rate/Att Rate from Wind Canon.

These bonus attributes are directly affected by your magic attack and the lvl of your canons, hence more magic attack + higher canon lvl = more bonus in BM1. You can consider using +magic attack items like EoS, mana condense pots & friendly buffs from FA/Wiz when you wanna use BM1, e.g. in high lvl dungeons.

*note* You can't cast your 4 normal buffs in BM1. Instead, they will be auto re-casted soon after you finish your BM1.

Battle Mode 2

Blade Shocker : Force Bladers has been changed after the new update, thanks to DUDONG PUGE for the heads-up. Lasers will no longer be available when you cast magic skills during BM2. Basically, all you have to do now is to activate auto-attack and normal attack your target, and your FB will start using a different style of melee attack.

Freezematic Blade

Using 7 elements force to cause critical damage

FBs have relatively high Crit Rate and Crit Damage due to Lightning Blade buff and on higher levels you can even stack it together with Ice and Fire Blade after rank up quest (WOW!). Also, due to FBs low base Attack, FBs won't deal good damage with full sword amp gear. So GO CRIT WHEN YOU CAN CRIT AND THE REST GO AMP/HP, hence FB equipment formula, Crit>Amp>HP.

PVP / War Gears preferably (armourset/battleset/terragrace +6/7):

- 2 ring of luck+2/+1
- Amulet of Battler/Amulet of Pain
- Double Slotted Crit Damage Helm (Crafted Deathblow 5/8% crit damage if possible)
- Double Slotted Crit Damage Osmium (or higher) Blade / Lapis (or higher) Crystal (Deathblow if possible)
- [Amp][HP] or [HP][HP] Double Slotted Suit (Crafted Will or Amp if possible)
- HP Double Slotted Boots (Crafted Will if possible) or [Amp][HP] boots (rare)
- Gloves slotted Amp (rare) or crafted guard/destruction and slot with whatever you like
- 2 Vital Earrings
- 2 Bracelet of Fighters +1 or above
- Epaulette of Fighter +6 or above
- Astral Board (Bike not recommended as it does not +HP)

PVE: Use the above set for full damage and you may replace vital earrings with earring of guard and you may use amulet of guard+8 or above. OR use lifesteal set to survive longer in higher level dungeons. Lifesteal set:

replace 1 ring of luck with 1 life absorb ring or force absorb ring with 5% lifesteal (yes 1 ring is enough, and you should focus on items that can raise lifesteal limit/+max HP steal)
use Vampiric Amulet +3 or above
Vampirice Earrings
Other equips crafted vampire if possible but not necessary
lifesteal formula is stated on top of this guide

that is incorrect xD

it is to upgrade your BM 1 or 2 if you have those magic skills you will gain extra def rate, atk rate, atk and def while in Bm 1 or 2.