Selfcast crit Arctic Breath build help [Hardcore]

Hey everybody. Here is my build I had planned:

http://cb.poedb.tw/us/passive-skill-tree/AAAAAwUBAv4DHgQHBLMFQgceB2MI9A3RDkgRDxEtEZYUsBa_F1QaOBzcH0EgbiKBJpUnLylPLJwy0TeBOlg62DwFPV9BlkLDQ8hFR0WdSVFMLUyzTwRQMFIpUlNTUlPUVUtVxlXgVkpYWlugXfJfKmHiY0NmVGjyakNrt20ZcFJw1XwOfIOCHoKbg9uFMoV7hX2IQonTjDaNgo48jxqP-pBVlS6XlZf0mjua4J6hnwGf36IAp1WsmK6zuZO86sBUwGbBxcMJy73QH9D10eTbC9-E41bk6-vk6-7r9ewY7DjvfO_r8B_w1fId-d0=

My problem is that with the current state of casters I feel like I don't have enough life nodes to not die in hardcore. Any suggestions what I could change about the tree? I am also not sure how much arctic breath benefits from increased AoE and how useful my mana nodes are gonna be if I run EB since I'm most likely gonna use Auras on most of my mana pool.