Randomocity

If Ink's superior status is the result of drugs he was taking when he turned, hasn't it already been established that the Zeds acclimate to drugs or physical attacks very quickly--for instance the chloroform--even when the dose is upped? So, maybe what he was taking could have affected his outcome but taking more afterwards wouldn't. I think his need for more chemicals will turn out to be either/or to make the zombies obey him or give him control the making of other zombies.

He's not the only human in the world taking antipsychotics.

Zomboids react to the smell of human sweat but hey ignored Skittles (pretty sure it wasn't out of gratitude). Way back when, I pointed out he was walking around the area of arena with no protection (or sanity). I've always thought maybe something in his personal body bouquet makes him invisible to them...or maybe he sort of smells like one of them so he doesn't read as target. It will be interesting to see how the one menacing Tanya and Saul reacts to them. When Saul crashed the car, the zombies couldn't smell him (maybe because he reeked of booze) but Randy was able to smell Tanya enough to drag her with him...or perhaps he was targeting people who smelled like her.