Elementalist coc ice nova Help/Guide

Hi first off all sry for my bad english.

I just have a few qustion about this build, i am trying it and love to play it but can anyone tell If my gear need a upgrade and my passive tree.

I think off my dps can get better :)

Char:
https://www.pathofexile.com/account/view-profile/Nrok82/characters

Passive tree:
https://www.pathofexile.com/fullscreen-passive-skill-tree/AAAABAMCAAECAW8GOQ18D8QRDxZAFy8dFB8YIvQkLSlPLL8tqTHvMlg0CjdmOtg7DTs_O3w9D0I6Rv5HBklRSkBMi0yzUDBRYFH7UilUrlXWVeBYWlxrYShjQ2TnZlRmnmwIbAttGXvXfLt9sH3Sf8aApIRIhXuFfYbKi3qMdo5kj0aP-pD6kyeXlZf0myGboZ48oS-io6yYtAy2-rcxtzi4yrsBvorBxcNtxorK080W0B_Q0NQH217b59yN323fiuL342Lquutj7BjsOO9L7-vw1fGK8uHzBvem98H31_rS-6o=?accountName=Nrok82&characterName=cocnrokk