So I've been playing selfcast Hexblast ignite as an Inquisitor for my league starts for quite some time now, and I decided to take it to endgame.
Ended up going Occultist and converting Ignite damage to Chaos with Blackflame and about 15m Ignite DPS (100m total damage per ignite).
The character is very tanky as it has 90% all res, maxblock and is CI with Incandescent Heart for Extra Ele damage mitigation.
Currently there is no one playing Hexblast in this way on Poe Ninja so I guess you could call this an "off meta build" lol :). I do like the Ignite playstyle and maybe there are some fellow ignite enjoyers that might like this. So here's the build guide/overview.
Guide: https://www.youtube.com/watch?v=S_gZzp1ewnQ
PoB: https://pobb.in/IwwVFNSczmrv