I don't have much experience with the set, but I think Skewer and Fling Thorns are considered to be good. Skewer has a very fast animation and does a lot of damage. Fling Thorns is a large cone so it tends to hit a lot of things even if you're up close. It's also good for inflicting cascading defence failure.
Looking through the set it looks like they are all decent powers.
I mean outside of the standout Thorntrops, all the powers look Middling/Decent, I guess that is Thorns thing.
What do you guys suggest I skip?
When something good happens to me, I can never enjoy it....
I am always too busy looking for the inevitable punchline...
BEHOLD THE POWER OF CHEESE!