Crit Spark Inquisitor Looking For Advice

Currently looking to move into high tier maps for the first time and would like some advice on gearing.



I just need a little more experience on Catarina to craft the level 6 spell damage, but I'm not sure what to upgrade after that. I'm looking to buy a 6L, but what should the 6th socket be? And is a pure ES chest going to be better than a AR/ES chest?

6L Options: Increased Crit Damage, Faster Projectiles, Added Lightning, Controlled Destruction, Faster Casting, Life Leech

Current tree: poeurl.com/Arn
The rest of the levels are taking the easy jewel nodes, the spell crit multi nodes, power charges and lightning damage nodes.

Thanks in advance!