We just did Seriyu x2 we got one M. Abj. head peice on first and then TWO dropped on the second guy. And I got one woot! Before us a LS did Seriyu 3x and got a abj. each time guess it was the paladin's of lakshimi's lucky day. Now if I can just get a cursed schallar ; ;
Besides the body, all of the pieces are incredibly cheap on Pandemonium. The majority of players on my server are THF or NIN so it's mainly the Shura and Hecatomb armor that are super expensive. Around 5-7mil per piece. The Cursed Cuirass is about 1mil at the most with the remaining pieces all set around 150-200k
First off you have to craft a Cursed schaller (which is very high Goldsmithing, Smithing, and Alchemy I beleive). You can't equip it though because it's cursed...however you can sell it for a pretty sweet price in Jeuno (it doesn't become Rare/Ex until it's uncursed) Look under cursed items at the Jeuno AH...the whole set is usually there. And almost each peice sells for 1,000,000 pluse gil.
Anyway...once you have a Cursed schaller (or cursed cuirass, or whatever peice you need) you need to get a M. Aburation: Head (or again...depending on what peice you are working on, M. Aburation: Body, M. Aburation: Hands, etc.)Aburations are very rare drops by HNM. I know Fafnir drops A. Aburations and W. Aburations, but I'm not sure what drops M. Aburations. I think King Behemoth may be the one who drops the M. Aburation.
Anyway...after you have the Cursed schaller and the M. Aburation: Head...you take it to one of the NPCs in the cathedral in San d'Oria. One of the NPCs in the library removes curses from items I think (I'm not 100% about this, my friend is in the process of getting his M. Aburation...but if you talk to one of the NPCs one of them says something abot how he can remove curses from items if you bring him a cursed item and it's correct aburation).
After that you should receive the Koenig schuller after he removes the curse. If you had a Cursed schuller -1...you will get a Kaiser schuller (which is basically Koenig schuller +1). Now all you have to do is do the same thig for the rest of the armor.