[2.4] Chaos Vortex Build - Occultist Witch

playing this on breach 2.5
this build is nice, fast and very much fun to play, though it's getting quite expensive if you really want to feel it's power and needs some tweaking. whole content up to t15 is playable with 8.5k ES and 5L infernal mantle, tho there were some hard times with some map mods (i.e. cannot leech) and maps (some t15s).

clear speed is decent.

soloed with 2, max 3 portals esh, tul, uul-netol and xoph with 5l, tho tul was somewhat hard.
soloed normal atziri with 3 portals.
never tried shaper, guardians, uber-lab or uber-atziri.

6l is another story. I had "Added chaos" instead of "Rapid Decay" and was swapping it with "Concentrated effect" for the bosses.
uberlab? no problem. breachlords? 3 seconds. end-game is easy with that.

I followed the passive skill tree, but changed the itemization.
swapping sapphire flak for ruby or topaz when needed, swapping added chaos for concentrated effect on bosses. pulled up 120k+ tooltip dps without witchfire brew. dot component was something like 18k+.

has anyone used vaal fireball in the 6th socket of a 5link for crowd control?

It's to bad that this build has not seen any sort of update. I feel like it is still really strong in 2.6. Since pyre has been nerfed down to 40% cold to fire, I wonder if it might be best to use the Cold to Fire support gem as your 5th or 6th gem link.