For the Adhemar Jacket, if you're specifically looking for the Jovian Abjuration: Body then I have something that may or may not help.
http://www.ffxiah.com/forum/topic/49623/ffxi-strategy-videos/
You can find a few different lowman pakecet strategies there. I would recommend the BLU trio since the requirements are rather low: basically just a few nibiru cudgels, a jhakri+1 set, and decent fc and pdt sets. With the upcoming trust HP event it's pretty easy to duo him BLU+GEO+2tank+2whm trusts if you use the right tactics and a trust HP+50% campaign. It's nice being able to spam him without coordinating 6 different players together - it's less trouble. If you want to know more check out that link and/or PM me. I'll probably be making a BLU-based video for it soon - the one up now is from a PLD's perspective & PLD isn't necessary there - it's just convenient when there isn't a trust HP+50% campaign.
Well, sorry if that's not anything similar to what you were hoping for! This is a free bump nonetheless ^^;