PoE Might of the Bear, Nova builds

Disclaimer this is just a fun side project that i am working on and also my first time doing a low tolerance build, so there might be intricacies that I am unaware of. Also extremely expensive build please do not try. You have been warned. The build revolves around the medium cluster notable tolerance which makes the first poison you inflict deal 300% increased damage. I am currently using 4 low tolerance with poison mastery for a total of 1500% increased damage. Discharge does one big hit to apply 1 stack of poison through original sin elemental to chaos conversion. We also want our poison

I have pretty much everything I need to swap to LL except a belt. Crystal belts with 14% cooldown recovery seem to be absurdly expensive, so I'm trying to craft my own. I really only want a decent ES roll and 14%+ CDR on it (I'm already overcapped on res except chaos), and anything else is just gravy. Anyone have any idea how I would go about crafting this? I already have an ilvl 85 shaper crystal belt. I currently use Ice Nova of Frostbolts in my main CoC link and Frostbolt in my Cospri's. I see a fair amount of people using