As a returning player, there have been so many changes in the game.

The skills have changed a lot. According to several youtube videos, Curse is now the best skill for mage even in pve. Traps is rated lower than shadow storm shot which was regarded as useless long time ago.
But I am still a bit confused of the reasons.

I want to start with my rogue in pve (lv51). But what kind of skills should be for pve? Besides, what is kraken procs and how is it related to skills. Aimed shot does not trigger procs makes it not a better skills than nox bolt.