Learn it till level 3, it is a good early game skill for its burst damage

With all these skills in place, you're free to max your skills as you deem fit; only proceed to level 35 when you feel like bounty bay online gold.

Because that right now thunderbolt revelation which seems like an awesome skill is not working, and mental concentration which adds 45% crit ratio is mainly for boss killing and pvp. Active Skills: (this will be the skills in you skill bar)

Arrow of Delay - keep it at level 3 to access heat shot, a good skill to use, efficient mp cost which makes it spam able. Basically it decreases the movement speed of the enemy.

Loading Restrain - this is a skill that in my opinion, is only good for pvp, so leave it alone till later on when you can actually do decent pvp around level 45 or so.

Heat Shot - Learn it till level 3, it is a good early game skill for its burst damage, but very mp taxing.

Energy Charge - max this skill a sap, gives you 80hp/12mp per skill level. Basically this is why you can grind till level 35 without much downtime.

Spiracle Shock shot - learn this skill till level 3, it knockback the mob and stuns it for a certain duration depending on the skill level. Not efficient for grinding due to mp cost and cool down, good for saving lives including your own.