My new COC witch build

Hello, I just got my witch leveled and geared up but I am having a little trouble running maps. Simply, some monsters are really hard to crit against and I get gang raped while I try and barrage them. I have around 4500 es, but I will be grabbing allot of es nodes soon when I level so that might help, but getting crits is not very reliable atm. My crit chance with barrage is 60%.

passive:


http://www.pathofexile.com/passive-skill-tree/AAAAAgMBBAcOSA_EES8RUBGWFVAWQBfYHRQfAiSLJ6kpTyycLL8tHzbFOtg7fDvhRKtHBkyzTdhPfVAwVa5d8l9qY0NmT2aebRlwUnB9cNV8u35Zf8aAVoFJghCCm4V9iGuMdo6-j0aPppLBmZqdo6KjpwinK7I4tve4yrvWwFHBxcHzwuzDbdA52CTa3d-w4vfjhOtj7BjsOPLh83Hz6vfB-tL8qw==

Gear:




My plan is to ditch my helm and go get a new one with around 400+ es. I do not think I need anything but es on it because I have max resist as it is and 1500 accuracy. Since I have such low mana, I put everything on a cast when stunned or damage taken gem. My curse will eventually go on one as well. Once I got a new helm, I won't change anything for weeks while I try to farm enough fuse to 6l an armour. Before I stop trading and start investing into a 6l, I would like to know if there is anything critical I need to change in my build. I hope to one day farm high maps a sell them as they drop for currency.

Thank you for your insight!