Wanting to bring Anti-Paladin to 5e, making dark mirrors of the main Paladin features. 

At first, I tried using the "Replace" feature on a copy of an Oath, but it only allows replacement of one of the Features of the subclass itself. So I switched gears and decided to make them Additional Features. Slightly more success, but I'm unsure how to add things like the counters connected to Lay On Hands.

Any suggestions?

You won’t be able to replace or delete the base Paladin features, we don’t have access to base class level stuff in the homebrewer. For the counters you asked about, please see the Subclasses & Races FAQ #4: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq).

THANK YOU!!!

You've answered questions I haven't even asked yet!!

Then please vote “Very Helpful” in the poll attached to that FAQ! Happy to help.