I've found a semi-solution to the Hozen evade-bugging issue after searching the main Blizzard forums (credit for this discovery is not mine). A hunter's explosive trap seems to be the only thing that will do damage to a bugged Hozen rare. If you've got the tag, hooray, you can still get credit for a kill. It'll just take a while, spamming explosive trap at a bugged Hozen's feet. If you don't have the tag, you can still kill it if you're feeling charitable so it'll respawn like normal on your server.
I used this method successfully (if slowly) to down Major Nanners after he bugged on me at 1 million health. He evaded the first tick of the trap but then took damage for every subsequent tick. I didn't keep full track of my DPS during that time, but it seemed to level off at a whopping 1.4K.





