an ezpz alternative to the guards in the above cities is the two wandering Ogre guards in the Feerrott,
Bouncer Hurd and
Flerb, easy for you to track down. I spawn camped Hurd to level my druid from 39ish to 45 and it was on average about 10pp per kill. Can sell to the
neutral vendor in zone when getting encumbered.
killing both is not a lot of plat mind you but it's a mindless and easy 120pp~ an hour. Add in specters near PoF, if it's open, those scythes sell pretty well too.