PoE Assassin, Withering Step builds

I've played PoE a few leagues, years apart, and keep coming back and re-learning the game. I started off following a blade flurry build guide, but was underwhelmed by blade flurry and enjoyed reave a lot more. I realize reave generally is played by gladiator and a few other classes, and I don't see any Assassins on poe.ninja using reave this season. So, since level 50 i've been sort of trying to cobble together a build that works. I'm wondering if there is anything salvageable here or if I should stop trying to chart my own path and really just follow someone e

Tornado Proc rate Calculator My original guide (SupaSpork)

PoB: T16: So I made a Molten Strike Assassin with about 1-2 div investment that relies on Mantra of Flames buff stacks (which have to be edited into PoB) and specifically fortify (which gives 100 buffs regardless of cap), multiplied by Replica Last Resort. Damage is ok (1.4m melee dps and 1m per ball with 6 balls that are slowed to hit a single target well). At lvl 91 it can do T16s comfortably (with essesnces/strongboxes and harbingers on my tree not causing too much of an issue) and Maven Atlas Invitations, I haven't tested it on

Asenath's Gentle Touch is cheap AF this league and makes PBV insane ATM for farming T16s. Ming's Heart + chaos catalyst is crazy damage for phys poison builds. Obliteration is also pretty crazy. Arcanist Brand BFBB makes the build's bossing much more acceptable for dumb fights, and is a moderate investment gear swap. The tree is set up for fast shield charging + QoL things like big AoE for mapping, inc. skill duration, unleash seals, charge on kill, etc. Despite all of this it absolutely slaps damage-wise. PoBs are fluffed up a bit because of low life settings. Feel free to add '15% less da