NIN/PUP is actually solid in certain situations... 30 second flash (unresisted), shield bash stun (with right attachment / body), and if you use valor head / storm body, your automaton will basically spam cure III on every 25-30 seconds if you are at 50%-75% health, which isn't really a problem for races with a lot of HP to dip down to 50% HP every once in awhile.
On top of this, you get good use out of the Lv50 Shinobi Ring (Haste+4% in yellow HP) and /PUP gives the Evasion Bonus trait.
The downfall is that this does not work well against mobs with strong AOE as your automaton won't last long or it will heal itself more than it will end up healing you.
The main benefit for this situation is if you're farming and don't feel like resting.. with the proper attachments, your automaton can keep your HP up fairly high most of the time with cures and just convert when it is low on MP (3 minute recast on convert). It could also be used for situational NMs, but if you're camping anything you'd probably want /WAR just for provoke alone.
edit: typo
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