If anyone is still interested in bit of data involving mastery ranks. Today I ranked up to rank 8 finally. Here are my current stats.
Rank 8:
-All Missions/addons complete
-Crafts capped (110 gold w/ escutcheon; ebisu+1/lu+1)
-All jobs mastered
-1075/1075 records of eminence
-Adoulin ring+1/Ygnas
-All Monster Rearing KIs
-Maat's Cap
-Level 99 Adventuring fellow
-All spells, trusts, mounts
-All skills capped
-Gold Mentor Flag
-12 REMA (1 relic, 3 mythics, 2 empy, 2 ergon, 4 aeonic)
-Max Fame everywhere
-Homepoints, Outposts, Survival Guide, Waypoints, Etc: Have All
-Vorseals: Missing 2 HP, 6 regen, 6 refresh, 3 acc++
-Abyssea complete/Atma of the Savior
-Monstrosity: A few 99s, currently unlocking all species
-Campaign Ops: 41/way too many (fiat lux(s/b/w), splitting heirs, plucking wings, cracking shells complete)
-Chocobo Digging: Amateur (only dug 30 items for RoE)
-Voidwatch complete; all periapts/atmacites LVL 15
-All dyna-d full cleared/judge,jury,executioner
-Master trial: 2/4 complete
-145/145 Atma
-65/65 Abyssites
-Incomplete Quests: Sandy, Aht Urgan, Crystal War, Abyssea (resistance ops)
-980/1074~ titles
-1006+ days playtime
To do: chocobo racing (2 titles left), 985 titles, guild point item titles (11 left without lowering goldsmithing), incursion level to 133+, maze mongers clears/all maze runes (currently 50 completions), get all vorseals, unlock all monstrosity species, NM titles (2 left), Battlefield titles (4 left), complete all quests
I don't think we have seen rank 9 yet, but I will still be completion grinding, so we shall see eventually if a rank 9 pops up somewhere