Update the Job Quests

[Deveryn]

Summoner's HW story says that a given person can only "hold" three egis at a time, to explain why we couldn't create a Ramuh-egi. Then we got Bahamut and Phoenix. Yes, they're technically demisummons, not egis, but the distinction feels like splitting hairs.

Machinist goes on about how the job was created as a support unit for the Temple Knights, but now machinists have no non-role support skills (aside from Tactician, which might as well be a role skill, since it's functionally identical to Shield Samba and Troubador).

Support isn't always about healing.