How to build a weapon for [Khora]:

In this example I will be using the [Jat Kusar]. The [Jat Kusar] is the Blade and Whip weapon with the highest combination of crit, damage, and attack speed available at the time of writing. This allows me to put the [Khora] Ushuru skin on it and look faaaabulous!

Anyway, the most important thing to know when deciding how to mod a weapon for [Khora] is how the mods will affect [Khora]’s whipclaw, because no matter the focus of the build, whipclaw is cheap and should be worth using. Partially from the Warframe Wiki:

Damage is affected by Ability Strength, the Melee Combo Counter, and certain melee mods.

As an example, with a maxed  Pressure Point,  Shocking Touch,  Intensify, and combo counter at 9, the normal attacks of a rank-3 Whipclaw will deal:
Base Damage × (1 + Damage Mods) × (1 + Elemental Mods) × (1 + Strength Mods) x (1 + 0.25 x Melee Combo Multiplier) =
300 × (1 + 1.2) × (1 + 0.9) × (1 + 0.3) x (1 + 0.25 x 9) = 5,298.2 damage.

• The mods that affect Whipclaw include:

Damage (e.g., [Pressure Point])

Physical damage (e.g., [Jagged Edge])

Elemental damage (e.g., [Shocking Touch])

Conditional mods (e.g., [Weeping Wounds] and [Blood Rush], but not [Condition Overload] and [Healing Return])

Critical chance and critical multiplier (e.g., [True Steel] and [Organ Shatter])

Status chance (e.g., [Melee Prowess] and [Vicious Frost])

Combo counter (e.g., [Body Count] and [Drifting Contact])

Weapon augments (e.g.,  [Justice Blades])

Rivens

So, all mods that fit in these categories will apply to your whipclaw. However, the whipclaw does not use the base stats of the weapon, but its own. The whipclaw has a 2.0x base critical multiplier, 25% crit chance, and 20% status chance. The base damage of the whipclaw and range are determined by your warframe ability mods. Also, since a quarter of the melee combo counter is added to the calculation, max combo counter is necessary to maximize damage output. This is especially true if [Blood Rush] or [Weeping Wounds] is added to the build.

Other notes, critical chance is rolled separately for each target hit,

The mods that I have used are meant to maximize the strengths that both the whipclaw and [Jat Kusar] have. So, the focus is on damage, critical chance, critical damage, elemental damage, attack speed, and combo count. You can replace [Quickening] with berserker if you want more attack speed at the expense of combo count growth. And if you don’t have the Naramon focus tree, then some combination of [Drifting Contact], [Body Count], and [Gladiator Rush] are required to keep your combo alive.

Rivens should be focused on the things listed above. My riven has damage, electric, and combo duration, which allows me to replace both [Drifting Contact] and [North Wind] with the riven and [Gladiator Might] for the extra crit damage. The goal with a riven is to replace two of the mods if possible so that [Gladiator Might] can get added without penalty.

TL,DR is to mod for:

• Damage
• Critical Chance
• Critical Damage
• Combo Duration
• Elemental Damage Areas
• Attack Speed (for weapon only)

Here is the Khora build that uses this weapon