Rent my level 95 Adventuring Fellow NPC! Casting on her counts as casting on a level 95 enemy rather than a PC, which results in much faster skill ups for these tough to skill up skills.
Using this method and B.E.W. Pitarus I was able to take Enhancing Magic on White Mage from 316 to 341 in ~23.5 minutes (Screenshots below). That is just over 1 point per minute. It does slow down around the level 95 skill cap for your job, but is still significantly faster than casting on yourself or others.
Due to how long it takes to fully level an NPC, I am charging EITHER 400K per hour or 1 mil for the full length of a pop, which is 3.5 hours.
Please message me on here or /tell Madranta if you are interested and we can set up a time to do this. Also, you will want some form of self refresh so you can spam cure 1 or protect continually.