Ala Mhigan lore isn't my forte unfortunately, but that being said it is within reason for him to have supported one of the three Grand Companies. However, any expectations of reciprocated support would probably be entirely one-sided, as the Grand Company strive for the preservation and advancement of their own nations and the Eorzean Alliance at large. Given how 3.55 is launching us into Ala Mhigo as well, I would say the Ala Mhigan cause is not the most cherished at the moment.
That said, The Immortal Flames would likely be the Grand Company to provide the most support to the cause of reclaiming Ala Mhigo due to Raubahn.
You stated that you've recently started playing FFXIV? If you haven't completed the MSQ I'd recommend experiencing it and then beginning to work towards this RP goal. Though it couldn't hurt to try and make threads for interest checks around here to see who'd be interested in joining you.
I'm not sure where you'd make a thread like that, but probably in the RP Discussion section. Make sure to note what RP server you'd like this to take place on. At the moment Balmung is closed, so the more popular options are Faerie, Siren, and Mateus, as per This Poll. It might also be worth seeking out the leaders of other FCs on which server you choose to see about collaborative efforts towards liberating Ala Mhigo, as well as how far your character's authority there could feasibly extend with the community of the server.
That said, The Immortal Flames would likely be the Grand Company to provide the most support to the cause of reclaiming Ala Mhigo due to Raubahn.
You stated that you've recently started playing FFXIV? If you haven't completed the MSQ I'd recommend experiencing it and then beginning to work towards this RP goal. Though it couldn't hurt to try and make threads for interest checks around here to see who'd be interested in joining you.
I'm not sure where you'd make a thread like that, but probably in the RP Discussion section. Make sure to note what RP server you'd like this to take place on. At the moment Balmung is closed, so the more popular options are Faerie, Siren, and Mateus, as per This Poll. It might also be worth seeking out the leaders of other FCs on which server you choose to see about collaborative efforts towards liberating Ala Mhigo, as well as how far your character's authority there could feasibly extend with the community of the server.