I farm hillsbrad epics by server hopping sometimes. All you need is 2 accounts with sub.
Create a bunch of lvl 1 undead characters on one of your accounts. Somehow undead starting zone is connected with hillsbrad, so you don’t have to move those chars anywhere from the place they start to server hop. Then log those lvl 1 chars one by one and invite your twink to joint group. This method only works with wm off since those chars are lvl 1. Alternatively, park some allied race characters with wm on in hillsbrad and you could cover both wm on and wm off spawns.