However, they are unique from those in that Disciplines also define a fundamental worldview. An Illusionist sees the world in a completely different way than a Nethermancer, down to the core ways in which the world is constructed.
That's why Multi-Discipline characters are often an immediate out-of-bounds for some (many) tables. Even where it is allowed, as Graymayne mentions, there needs to be both a sound justification for how those worldviews can (and should) harmonize and a character must convince an instructor in the new Discipline sufficiently on that point. A character/individual may be completely convinced that Swordmaster-Pacifist makes sense, but how easy will it be convincing a Journeyman+ Pacifist of that. At the end of the day, some fits are much more "natural" than others, but it's hard to apply that to magician Disciplines (except maybe Wizard-*).
Last, even setting justification aside, Multi-Magician has a sharper power creep than other combinations. Because of the heavy overlap between the Disciplines (always existed, but Magicians were more generic-ified in ED4 with more overlapping Talents), Multi-Magician can advance in Circles much faster than other combinations.
That's all just "for what it's worth." My personal opinion ~ if a character can tell an incredible story justifying the mix, and the collision of these worldviews is something that has been building up over time because of game events, that's much more important to me in comparison to mechanics (although, again, Multi-Magician is a bit concerning). And, even regardless of my opinion, it's your table, you should do as you see fit. 
Statistics:Posted by The Undying — Fri Jun 16, 2017 12:01 am
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