The Slash-Singing Lash:

[Condition Overload] because duh.
[Blood Rush] because this thing is going to crit a lot.
[Weeping Wounds] because this thing is not only going to apply slash earlier on than usual, but with combo, it's going to slash after every lash.

Replace [Berserker Fury] if you want 100% uptime, 100% of the time, with [Primed Fury].

Gladiator Might because, while it's a weaker Organ Shatter, it crits a little more perfectly. The crits aren't the end-all of damages, when it slashes so frequently.

Replace [Reach] with [Primed Reach], and this thing WILL snatch everything in sight.

[Carnis Mandible] because the extra slash only increases overall damageEven before the crits build up into the 150-200% range
And the armor bypass triggers more often, before you build combo. Good for boss fights, or situations where you don't NECESSARILY have a full combo to work with. Yeah, you'll just build the combo on the boss, but you'll also be proccing earlier in the combo.

Sacrificial Steel for the same reason as carnis mandible.
You shouldn't religiously dedicate your entire build to spending 10 - 20 seconds, building a combo just to fulfill some power fantasy, since this is also the most crucial period of time to finish off a level-cap enemy, before they one-tap you.

I don't even do steel path endurance. It's impractical, it's driven by the part of the brain responsible for gambling and causing gambling debts, and it's the part of the brain responsible for the worst invention in biology... stupidty.

[Dorrclave] isn't even the best weapon and I admire it more than anything else.