A LS mate of mine successfully defeated Diabolos Prime as PUP. Here's his post from our LS site complete with screenshots (for you POIDH hoes) and strategy.
Siyual from MonstersInc Linkshell wrote:
Just got the win on this fight as PUP/SCH solo. It was a very tricky fight to get the hang of, but it turned out to be fairly easy.
The fight was done entirely on the ledge, and never actually moving down.
The puppet needed to be equipped in a way that you can freely move between BLM RDM and WHM. Here's the attachments I used for this fight:
http://i2.photobucket.com/albums/y38/Siyual/Dark.png
http://i2.photobucket.com/albums/y38/Siyual/Ice.png
*** Note: You need Scanner for this fight. Otherwise they will cast Aspir after 2 nukes. ***
http://i2.photobucket.com/albums/y38/Siyual/Light.png
http://i2.photobucket.com/albums/y38/Siyual/Water-1.png
http://i2.photobucket.com/albums/y38/Siyual/Wind.png
And my equipment is listed here:
http://i2.photobucket.com/albums/y38/Siyual/Gear1.png
http://i2.photobucket.com/albums/y38/Siyual/Gear2.png
http://i2.photobucket.com/albums/y38/Siyual/Gear3.png
http://i2.photobucket.com/albums/y38/Siyual/Gear4.png
Dia II is very helpful above 50% to stop it from regening, though it may not even be needed, since I was keeping up with his idle regen with normal nukes.
From 100% to 0% it took roughly 5 minutes, or less. Though the clear time is 12:34, I had to restart the fight a few times while I found a working strategy.
Here's some pics from the fight:
http://i2.photobucket.com/albums/y38...abolosBliz.png
http://i2.photobucket.com/albums/y38...abolosOpen.png
http://i2.photobucket.com/albums/y38...l/Diabolos.png
http://i2.photobucket.com/albums/y38...abolosHalf.png
http://i2.photobucket.com/albums/y38...Diabolos25.png
http://i2.photobucket.com/albums/y38...iabolosEnd.png
http://i2.photobucket.com/albums/y38...iabolosWin.png
http://i2.photobucket.com/albums/y38...abolosDead.png
http://i2.photobucket.com/albums/y38/Siyual/time.png