So I mentioned this in the recruiting-thread, but the Where Fate Has Led document is a bit weird in regards to Resplendent Destinies.
At it's base, a Resplendent Destiny is crafted via astrology (potentially costing XP if you have too many) and grants you a number of background merit dots while wearing it, as well as giving you one Defining and two Major Intimacies which give you Paradox if you act against them. Those only take effect while you wear the destiny, which takes an hour of meditation to accomplish and undo (though that can be done quickly at the cost of gaining Paradox).
Then, there is a "Resplendent" Keyword which isn't used anywhere in the document. There are however plenty of "Resplendent Destiny of X" charms - however, here's where an issue starts.
Some of them just modify your abilities while you wear the resplendent destiny of their constellation.
Others allow you to create a persona, presumably as per the Solars ability to do so. It's not specified in the document how those work really.
It's a wee bit of a mess because of that Persona-stuff, since there's no statement in the document how it interacts with Resplendent Destinies.
Hence, a suggestion on how to untangle that:
Resplendent Destinies stay as they are.
"Resplendent Destiny of X" charms all modify your abilities while you wear an appropriate RD. This effect is gained on the first purchase, even for charms where it says "an essence 2 repurchase" or the like.
In the case of Resplendent Destiny of the Mast, you just gain the +1 Resistance, maximum 6, until someone comes up with something more interesting. Or alternatively +1 Stamina.
All such charms also gain an Essence 2 repurchase that allow you to craft more intricate destinies of that college. Such a "Destiny Persona" can be created with more Intimacies, including minor ones, at no additional cost (though you still gain paradox from violating them). As a special rule, you can take this repurchase at Essence 1 for your Caste abilities.
These Personas are activated when you don a destiny from the college of the charm that created them, at the cost of 10 non-committed motes. While you wear it, you're treated as having those Intimacies in place of your normal ones (instead of just getting additional ones). There is no danger of them carrying over into your normal personas as for Solars with Heart-Eclipsing Shroud (you instead have to worry about Paradox), but other than that it works like that charm.
Exiting such a persona could also always make you roll one Paradox die, though that's optional.
@Maugan Ra ,this would really untangle the mess there is, and give you the best of both worlds.