Actually focusing on my mastery rank now,
Will add some observations.
I was rank 6 pre-rank-10-update, rank 7 after.
Rank 10 San'dOria. Never swapped nations nor started other nation's missions.
All missions completed etc.
Something like 600-800 unique ROEs (don't remember).
~1400 deeds of heroism.
Mog garden quests up to max rank.
All Adoulin quests, Ygnas unlocked. All coalitions max rank.
Max fame everywhere.
All trusts unlocked. Fellow lvl75(?).
Battle content: V25 T1-T2 Odyssey. Some V25 T3 (2 or 3). V20 T4. All Dynamis full clears, all Dynamis titles. All Voidwatch quests and kills, Provenance included. Most but not all VD(*) HTMBs, missing the alliance i119 Ark Angel fight. Completed the original lvl 75 alliance Ark Angel fight and quest. Cleared Neo-Limbus full climbs and KIs - a couple full +4 set upgrades for both AF and relic.
Mastery Rank 45 in Odyssey.
Moblin Maze only up to unlocking revitiliser temp item.
Legion in a couple regions, forgot the rank. Up to the one you had to farm for blue mage spells.
Most whm/rdm/blm/brd/blu spells but not all of them. Missing tons of spells.
All combat skills capped at Warrior ML50. Four jobs ML50, couple 40-45. Pup lvl1. Smn lvl1. Pld still locked.
REMAs: 2 Mythic, 2 Ergon, 1 Relic, 2 Empy, 5(?) Aeonic, one stage 5 one stage 4 prime.
Crafting: One 110, subs capped. Fishing <20.
Raised my own chocobo way back at launch, never touched it again. Have my personal whistle which never used cause the bird is slow to load.
Synergy 80 (capped). Made all the mog house furniture for my 110 craft, plus required KIs for them. Also got the lvl 70 bought with points items from smithing in order to synergise them for the synergy boosts.
Bought all the available crafting clothing and skill items and KIs, excluding shield related KIs.
From a couple other reports, noting that
quests per city nation seem to matter a lot, while nation story lines count for something. Note I was rank 7 with only one nation story line done.
Adoulin in particular seems to give you points in several categories including coalitions rank, quests within Adoulin and mog garden quests/storylines.
All jobs 99 counts for something, but not much I believe (I never unlocked pld).
I also don't think AF completion matters much, I never got most of it nor did most of the quests (used vouchers). I do have a couple full quest lines completed for AFs - most probably first completion gets you most of the points.