To answer your question about whether or not Job-level mastery would be necessary for my character...
I would say that if I go the route of Conjury and Thaumaturgy, then I don't think it would be necessary to make her a combination WHM/BLM. As it's been confirmed, the arts are outlawed and require a very high level of trust to be allowed to wield even without a Soul Crystal. Plus, all you're really missing out on is Holy, Flare, and a number of support skills.
SMN and SCH, however, I would say would both be pretty important to Miranda's background and personality. For one thing, Arcanists are strongly tied to Limsa Lomina as cargo inspectors, and second, the Jobs both have unique storylines that would tie in very well to joining the Scions - especially Summoner as you decide to help out the researcher so that you can learn some ancient secrets about dealing with the primals.
I would say that if I go the route of Conjury and Thaumaturgy, then I don't think it would be necessary to make her a combination WHM/BLM. As it's been confirmed, the arts are outlawed and require a very high level of trust to be allowed to wield even without a Soul Crystal. Plus, all you're really missing out on is Holy, Flare, and a number of support skills.
SMN and SCH, however, I would say would both be pretty important to Miranda's background and personality. For one thing, Arcanists are strongly tied to Limsa Lomina as cargo inspectors, and second, the Jobs both have unique storylines that would tie in very well to joining the Scions - especially Summoner as you decide to help out the researcher so that you can learn some ancient secrets about dealing with the primals.