Note that while you can use any weapon, whips such as [Scoliac] and [Galvacord] have access to [Nira's Contempt], which is currently bugged as the +100% slam attack damage applies to all melee damage, meaning the mod actually acts like a +190% melee damage/+60% status chance mod for stat sticks which is superior to spoiled strike.

Why not stack Sacrificial Steel + Pressure +/- Crit Chance on riven to get max possible crit chance?
While you will potentially get 'red' crits, this will come at the cost of either base damage (PPP/spoiled strike) or slash damage (buzz kill/carnis), which ultimately actually reduces the final average damage and slash bias and total DPS. For example in a non-riven build, slotting sacrficial steel over buzzkill and [Sacrificial Pressure] over [Primed Pressure Point] increases Crit chance from 162% to 231% but reduces damage per hit from 13,000 to about 7500, while also reducing slash bias (from 61% to 49%). The average damage per hit taking into account crit multiplier therefore gives 99,000 (no sac mods) vs 76,700 (double sac mods).

Preferred riven stats
Wanted Positives : Crit damage > Damage > Crit chance > Slash > Combo Duration
Unwanted Positives : Elements, Puncture, Impact
Wanted Negatives: - Puncture, - Impact or any other harmless negative