How to improve this tree? - link in the thread

So, i'm trying to plan a tree but I'm not sure if I'm doing it right. I don't want a build guide but I want somebody to review this tree and tell me what's wrong with it (like if it's not enough health or damage nodes or if I took something pointless or if there is something I can improve etc).

The tree: https://www.pathofexile.com/passive-skill-tree/AAAABAEDAEGHWfP8S5Rv-eimo5LQBS0hNHh6OuE9_IZgZlQJ9oIHducD1l8_qSdR5gmWxPa8n1BHNumexXKp2mK0L3TxZp4t0hhWz3677ZBV42rkURLhr42fPqZXTePEWCFg8kW9YHrvffVeExRNFm9qATkOkc7Tb64-_o-XeQbDxq46Urc-HKe9NvPdVanvDhQgh2o4U2ebdqwOPBRxxBVBPymlWGNodP4KJvOXtBiRxtjZfKyqfNn3MvjrJ-1J1SSq706DXwxfhNlyD9R8YVJAoHdT-tKi6ka3OztlTb6n6hjzbwm7xgSplBo4R35oZbl-E6UGDoPM9khTpTwt2L01kiKvHRSE7w==

If you wanted to know - the build is an idea of using Hrimsorrow with Pyre and Avatar of Fire to achieve 100% phys to fire conversion (well, actually it's just 95%) and then using some AoE attack with it. It might be a stupid idea, but I'm still going to do it.