A couple things I want to throw in.

1) Is V's jar of diamond dust on Durkon now? I see they are both listed as having it in inventory, but I'd argue that Durkon didn't have it when they resurrected Roy, so the diamond dust he has he must've acquired between then and now, which means either he procured the diamond dust in the EoB or it's the same jar V purchased in Sandsedge.

2) Has anyone brought up the strip where Tarquin is standing on his mount? The SRD20 website states that standing on a mount is an epic Ride skill. One can infer from that short description that perhaps one can stand on their mount w/o being epic level and take a penalty to their action. And I've never played DnD so I don't know how to interpret that, but given what he does to Roy in the next panel it doesn't seem like he has penalties to his movement.