If im being honest, the Enslaver is weak damage - wise. He has a lot of health yes, but the only thing that makes him hard to kill is the thorns.
The pets he drops are okay, im not complaining about them but i wish they were better than rares.
The Cartogropher is genuinely an insane aspect, as not only do you sometimes get legend loot, you get challenge maps that progressively get harder. The one thing i wish was included though, would be Legend tier challenge maps. And maybe a small chance for an eternal every 100 floors.
The one thing about the Cartographers that kind of stood out to me, is that you’d always get a golden chest full of loot, which normally gets me a LOT of items.
Enslaver - Luck affects the Normal > Magic > Rare > Epic > Legend chance to drop for Pets like it does for Items. but the Legend Pets are still rare. I have gotten a few Legend Pets outside of the Enslaver Feat, so it is possible.
Cartographer - killing Cartographers and collecting Maps Feats are the only way to get Legend Maps.
An Eternal Farm Build with two Nadroji’s Bonus affixes will increase your chances of getting Eternal Pets and Eternal Maps. you could make an Eternal Farm Build without the two Nadroji’s Bonus, but having them increases the spawn rate of the Enslaver a little bit.
here’s a thread on improving chances of getting Eternal Pets.