I would +1 the relic if the primal progression isn't good.

I think "safe" myth choices are the Hero's bracelet, Hero's Ring (only cause there's two slots) and Melee Gaskins.
The Fuma chest is a pretty decent stop gap due to its itemization.

ziddyt's method of getting the chest first is technically better. However, I think using the 80 gear available makes for a steadier progression. Considering you're rolling for mnk gear as an off spec, you really have to take luck into account and maybe use some of the alternate gear paths.
I, for example, have never even seen the Visor drop, though I've been downing turn 4 for more than two months.
Though admittedly, our luck was horrible. We saw like 2 monk drops in the space of 2 months. So maybe we're a bad example.

The myth helm isn't that bad, so it's a good option as well.
Ideally you want most allagan otherwise so it's hard to put a value.
Try to get a Garuda Ring, keep your accuracy steady and minimize spell speed otherwise.