PoE Firestorm, Witch, Fire builds

Let me preface this masterpiece of a build by saying that I grinded super hard early league, and now that it's died down a bit and I'm a bit burnt out atm I decided to "min-max" the ultimate meme build: Cast on Death. I wanted to take this silly support gem and make something other than just a portal for squishy MFers, so I did some thinking about what I could possibly do to maximize damage, and only one gem came even close: DISCHARGE. I hereby present the ultimate 1-shot boss killer: 1 shotting Drox before he can go invuln w/ 2man hp:

I planned out a character to see if the dmg numbers are there. Notes on the gear i chose: I tried to create gear that is achievable in a trade environment without too much investment The helmet is supposed to be either a blizzard crown or just a hunter base for the added dmg Amulet simulates the new dot multi roll and the base ignite changes gloves are a mix of the new added dmg rolls on rings and the dot multi from the hunter gloves the normal jewels are 2 prop only jewels, so should be fine to get medium clusters could be tricky to get, but swapping out 1 notable for a diff

different trees for fire and lightning, i was lazy for the cold one and theres plenty. same goes for the gear set. dont forget to switch the skills on the left and in the skills section properly. I went more into detail with the fire tree because i love firestorm and i love the stygian MTX even more so! I choose Tornado Shot for the trigger because I like the skill. There is also Blast Rain and Rain of Arrows. Another nice way to trigger would be Barrage with the volley unique jewel - its up to you. You can always ditch some damage with a GMP for mapping, again - up to you. We are pretty t

Need source of blind. Possibly: Blind on hit gloves, or work blind support into CWDT links. Abhorrent Interrogation as gloves would be nice DPS boost. Maybe self-cast bone offering, since BO/Crem/VD would consume all my desecrated corpses, leaving none behind for damage bonuses (nearby corpses)?

I've spent some time theory crafting this, if it works I'll be very happy, it has 8k phys ehp, the items are fairly idealized but most rolls are set to average since I dont want to plan around 6x t1 rares, having the right mid tier rolls is enough for me on most numbers. Hopefully this isn't as far fetched as I'm worried it is, the jewels are probably very expensive but there are a lot of rolls in those categories that should increase the dps in similar ways. Criticism and tips are very much appreciated.