Skill tree for Cast on Critical

http://www.pathofexile.com/passive-skill-tree/AAAAAgMABAcFtQceDXwOSA-rEFgRLRGWE3EWQBa_FvkXLxo4HwIi6iT9JpUo-ilPKgssnC0fL28yNDLRNulBckSrRUdFfEbXSVFMs1AwUEJRR1M1VUtVrlXGVdZXyV3GXfJepWHiYwtjQ2TnZp5vnnBScLtw1XYRdwd8g3_GgKSBr4IQgpuCx4MJg9uFfYcTiDiJ04uMjDaNv4-mj_qQVZUglS6Xl5u1nKSdiqIuoqOnhLEFtDi1BLiTuNC8msAawfPDOslnykrN-tkT2jrbXt-K37Dhc-Nq5CLk7OUZ51To1uvu7BjtIPDV8-r56PrS-4v79f_e

Is this a good skill tree for a Cast on critical build with a staff and Spectral Throw, are there better ranged CoC builds? I'm totally noob so don't be too harsh on me...