Wow...could be the laziest thing i've seen in a while.
You can wiki the job you want and look for it under the "artifact section" all the NM's for Head, Legs, Feet will be easy the body, hands will be a little more difficult but all have about the same odds of dropping. Some will say NM1 dropped more of a certain seal, where as others will say NM2 worked better. Do all that you can to make seals drop..TH + Blm spells + Nin spells + Brd + Blu + whm on certain days. Other than that there really isn't an "easier path" for NM's or at least I don't think so.
Dom Op is not a reliable way to find seals.
If you are really really lazy you can even google "Lancer feet seals" "goetia body seals" and it will take you right to all the information you need.
Do you own homework dammit..its not that hard.