I have all the information on all second jobs except one of Ravens.
Here is the high magician 4 part quest guide.
1- Get 30 drops from mages in Map 1 on any difficulty, 10 drops from Map 4 in any difficulty, and 5 MP potions that can be purchased from the alchemist.
2- Get 1 item from the Alchemist shop (costs 1000 ED) and get 10 drops from any dungeon in the second town.
3-Clear Map 3 on Hard while getting 20 hits or less.
4-Talk to the Alchemist in Town 2