SOOO I am a very basic user of Proxmark, so unable to help you directly, BUUUTTTT
I will through a couple of names out to get their attention, The ones that I can think of that I’m pretty sure have the PM easy and are quite knowledgeable, I’m sure there are many more but here goes
@Emumanx @cinja @fraggersparks @Satur9
And this thread by @sloot Antenna instructions that will help when you start PMEasy-ing your Implant