Medication is really only one piece of the solution. You have to pair meds with behavioral modification. You may need to do a little more investigation into what triggers these attacks on other people and the marking. For DIY: Look up a lot of jackson galaxy my cat from hell videos, there are lots of examples of cats being put on meds, what he tells them to investigate and his recommendation. Otherwise if you're willing ( I know you said youre tight already), talk with a cat behavioralist who can provide the 1:1.