so with the advancement levels changing...

Holy s'hit this exists??? I need to level some mules it seems.

Edit: Can you have more than 1 of the same link skill per character?
Like if I have 2 cannoneer mules at 120, can I put the link skill twice on my bm?

You can have multiple link skills on a same character but you can only link the same skill to a character once. Attempting to link the same link skill a second time will result in an error.

Anyway for other classes,

Elf’s Blessing: level 2 – 15% bonus experience
Deadly Instinct: level 2 – 15% critical chance
Guardian of Light: level 2 – 110 second duration
Permeate: level 2 – 15% defense ignored
Iron Will: level 2 – 15% HP
Soul Contract: level 2 – 90% damage increase (45% for Link Skill)

From Max by the way.