End Game

[JonBigwood]

I've checked out the amber accessories, and it looks the best tank ones are around 300k each

Are you sure the Amber ones are that expensive? The best accesories are the Rose Gold or Gryphonskin, and those are very expensive, but should not have astronomic prices. A melded HQ Rose Gold accesory is great.

If cheap, a HQ Amber accesory is fine until you can have a better one. The Amber accesories are level 49 and when you reach level 50 you can wear better ones. The Wolf Amber accesories are level 55, they are worth it if not too expensive until you have access to better ones. Wolf accesories are new from patch 2.1, they didn't exist before and there was not this alternative to the Amber ones.

For tanks the Hero Ring is great, the rest of the myth accesories are not that great and you might need the myth tomes for other things (other myth gear, the oil for the relic, the Zenith upgrade, etc.) You might save the myth tomes and buy the soldiery accesories when you can. Until then the Wolf accesories are fine, Rose Gold or Gryphonskin better but maybe too expensive, depending on the gil you have available.

Edit: Militia accesories (or Imperial Operative or similar) are another alternative to the Wolf accesories, look at the price, the stats, and choose. In Odin the HQ Amber accesories are a few thousands gil. Wolf HQ and Militia HQ are expensive, 18000 or 20000 now, they used to be quite cheaper, at least the normal quality ones, but it seems crafters are farming tomes or atmas and don't have a lot of time to craft, and also there are not many things to save gil for (the new ilvl 90 crafted items are never for sale, too difficult or expensive to craft.)