Level Drop
At level 4 and 5 the effect and duration are exactly the same:
This is how it claims to be when you right click it:
I am not sure I want to try enhance this skill, I suspect at level 6 it may have wrong value as well.
Grasping Root
It claims to apply x% of intelligence to damage:
In reality the damage of that skill is equal to x% of int (normal damage is not included), meaning the damage is rubbish - at level 5 much weaker than a regular attack.