Black Mages.....how are you using your myth points?

I'm a 1.0 players and started with a level 50 BLM so I started off playing as SMN through the ARR story. I got a bit attached to it so I purchased the myth ring and bracelet so I can use between SMN and BLM. I started to only use BLM after that. I have a Stardust+1 and I'm full DL minus my Sorcerer's Coat, Vanya Hat of Casting HQ, Allagan Boots of Casting, myth ring, and myth bracelet.

Here is an image that tells you the difference between Allagan and Myth gear:
http://i.imgur.com/AKlQ7k3.png

I plan to get the hat today since I'm holding off on the myth pants in favor of the Allagan on. I'm just curious to see what path people are taking to upgrading their BLM.

Really depends on how you want to play it. You could go for (what's considered) optimal BiS gear only, you could go for "wasted" mythology spending like on your gloves to make up for an accuracy need, or just go with what upgrades you can. Personally, while I'd love to just buy what I consider BiS and save my tomes for another class, my Allagan luck has been non-existent over about 35 chest drops, so I've bought gear I probably won't end up using within a month or two. Anyway, what BLMs should probably go for (no real math to back this up, sorry):

Relic+1 > (accuracy increase on gloves, feet, chest, or belt if it can't be made up with Vanya pieces or food) > Myth Ring > Myth Necklace (Allagan Necklace is T5) > Myth Bracelet > Sorcerer's Petasos (considered BiS hat, if you can afford accuracy loss) > fill in the rest based on what you haven't gotten yet.

I bought feet, then gloves first, because my BLM wasn't 50 yet and I was still on a different relic quest. After that, 1, then 1 ring/necklace. I'm going to get the leggings next, even if they don't have as much crit as Allagan Leggings, they still look way better and I'm of the opinion that unless you stack stats, they're kinda not worth stressing over anyways.

Using the myth to get other jobs' relics lol.

I don't feel in a hurry to get any relic armor for any jobs because it's not required to progress at this point. That, and iLVL90 stuff drops in BC. Most of which has superior stats (i.e. DET) over most of the AF2 (which has SS).