Hmm, hard to say. Vasco had the "Demean him, cast flesh to stone on him, stick him in the mine, threaten to kill him if he quits" thing going on. Ever notice Zach only quit the Vardo after Vasco had been missing for a few weeks? ;P
That's sooo last November now. I guess if you want to get under Zach's skin you could make fun of how rail thin he is, or how drug-induced impotence. If he's called "Limpy" enough it would start giving him a sad.