So upgrade weapon and belt asap is what you're saying, then focus on getting the level 95 stuff?
Yeah, weapon ASAP, as well as working on Tantra+1 set. Eventually Tantra +2, and the other good single pieces (Atheling Mantle is one that comes to mind as a great one to get right away).
Belt just get when you can do it, but it's obviously an awesome upgrade any time you can move to Black Belt. No shame in continuing to use Brown Belt though as you work away.
Even more important than gear, make sure you get the good atma from defeating Abyssea NMs, which will be a bigger difference when equipping them in Abyssea than any piece of gear. There are three Abyssite key items that allow you to equip one Atma for each - you get one from your first Abyssea zone boss win, one from spending 100,000 Cruor to buy from NPC, and the last from your 7th Abyssea zone boss win. Get the first two right away as a big time priority - you can build up cruor fast while in an exp alliance in Abyssea.
* Razed Ruins and Gnarled Horn are musts. Beg for help for these as soon as you can!
* Voracious Violet and Sanguine Scythe are also very good.
* Apocalypse is great, but will take you longer as it comes from the boss of Abyssea bosses (Shinryu). A common setup for MNKs is RR/GH/Apoc, it's my default set.
* Stout Arm is a solid placeholder that's fairly easy to get (and comes from a zone boss you'll need to kill anyway). * You probably have Proto-Omega title from Limbus, and with that you can spend a small amount of cruor to buy another solid DD atma (Alpha & Omega) from the synthesis NPCs in Abyssea, to hold you over.
I have most of the other stuff you said is good, Anza, with the exception of Aesir Earring. I never got around to doing Einherjar, which is a shame.
Aesir Earring actually doesn't require Einherjar! It does require having the ToAU missions complete, but once you have that it's just a short quest to get the temporary key item needed to enter the Odin BCNM-style battle. Aesir Earring is one of the possible rewards you can choose after winning - it's like the prime avatar reward system, so no need to worry about drops either. With a few friends you can easily knock it out in a couple hours.
There are other good earrings, but Aesir is definitely a solid option and not that hard to score. Lots of 95 MNKs TP in it. I prefer Moonshade Earring (WotG final reward, choose regain and either Acc or Atk augments) for TP. Tantra and Bruiser earrings are also solid choices. Brutal remains stapled to your ear (except for Asuran) just like always.
Crit weaponskills are king in abyssea, Acestic's Fury is great
Lastly, it's important to get staff high enough to have Cataclysm, and you need to unlock the Retribution ws as well. Similarily, you need to get all the weapon skills for club. You'll eventually probably want to cap staff skill, but hold off on that until you unlock the ws's on both weapons.
Two good points - Ascetic's is indeed your go-to WS in Abyssea unless you get Victory Smite from the Empyrean weapon.
Staff/Club come into play when triggering weaknesses with the relevant WS. I'm often using a staff to get red or blue weaknesses triggered, then switch back to H2H to kill stuff. Look up "weakness targeting" on wiki for a good summary. (I have managed to still slack off on breaking my trial club since I'm always with others who have Black Halo... Need to finish that up one day.)
Anyway, welcome back to a long time MNK. Enjoy the crazy differences XD