got from lvl87.2 to 88.1 day before yesterday.... full moon 100%lightsday and 98% darksday...
50 synths
cost of ingredients ~ 1.5 mil
sold product to AH + npcs ~ 300k (would have been an extra 100k if I sold it all to AH.. but takes forever to even move 1)
loss ~ 1.2 mil
dumping 1.2 mil is painful... but at least I got some skillup from it and finally Veteran status... At least it's not as painful as losing a damascus...

I'll try the same again next fullmoon on windsday and see how that goes with skillups... don't think it'll vary that much tho at this lvl. by the way, the guild test item at 88 is a celeta...
there are other ways to make money and skillup from lvl85-100 with adaman equipment. But most items sell very slowly on AH and there are always many of the same for sale at the same time... the cost of tying up 500k-3 mil gil per item waiting a week to sell for a 10-20% profit is a bit too painful. Though it's probably what I'll have to end up doing. No more powerlvling with minimal loss...
To the poster above.. I see a lot of people doing padded caps from that recipe. Seems to be pretty cheap and easy to do, providing there is adequate supply of rusty caps