The Scion of the Three: The Best Whip Subclass?

Hear me out. The Whip kind of cooks for this subclass. Outside of the fact this subclass wants you to play in melee but doesn’t give your Rogue much to help you stay alive in that range.

Go Human, get Magic Initiate Wizard, True Strike. Take Lucky. Now you have a way to generate advantage (including your Heroic Inspiration as a human) for almost every and eventually every use of Bloodthirst. Which is especially important since you’re forced to use DEX for these strikes. All the sneak attacks. Take Whip Mastery. Max INT then DEX (you should have 20 INT and 18 DEX by level 10, both maxed by 12).

With the whip your Bloodthirst has 40 feet of effective range. You can slow an enemy and dash away to put you in reach of whatever you want to potentially Bloodthirst. You can potentially Fear them starting at level 9 so they can’t approach you. But they’re also Slowed so they may struggle to reach anyone else.

A solid part is your Aura of Malevolence feature has 10 feet of effective range so this doesn’t mess that up in any way.

I see using the Whip’s range for Bloodthirst, the Slow mastery for hit and run tactics, and the synergy with the aura as all great boons for this subclass. Of course for some fights you’re just gonna bust out the Rapier for Vex, but a Whip is a solid companion weapon.