Bestial Hammer:
This skill is basically worthless if you ask me. Due to the fact that when it's at level 10 which can't be achieved until somewhere in the 40's and even then it's only 7xx damage. There are plenty more useful skills that you could be using instead of casting this.

Strangle:
This is a pretty useful Pet Forest Gold skill which does your normal damage plus an additional 15 seconds of bleeding damage. I tend to use this when soloing. It's not super important but it can be fairly useful.*Note: Only use this in PvP when trying to build up vigor for a more useful skill seeing as once the poison damage is reduced it only comes to about 200 or so over 15 seconds. Or if your willing to stack it continuously.

Thousand Ton hammer:

This skill is your bread and butter. Both for PvE and PvP, it does fairly decent damage aswell as a chance to stun your opponent. This is one of the few ways you'll be able to finish off an archer,werefox,or mage in PvP and you better hope your lucky since it only has a low chance of success. Level this skill ASAP.

Shatter:

This is a great skill to use when soloing mobs or even when your PKing alone or sometimes in a group if the WF is too slow to use their dispell with the same effect. The only downside of this skills i that you wont be using it at all during FB's. Level it as best you can.

Funeral Bell:

This is the first AOE you'll get and let me tell you, It's not all that great. It only attacks in a fan radius and does relatively low damage.Theres no real need for this skill but you can invest a little bit into it if you feel the need to.

Flaming Wind:

This is a pretty decent skill even though it only has an 8 meter or so line radius. Though it does cost 1 chi which you will be wanting to save for much more useful skills at higher levels. Level it a bit, it can come in handy for AOE parties at lower levels if the mage is taking abit too much damage.