sounds similar to my setup, i have about 4k glyphs in reserve on g bank + bags, on a banker toon, with inks in a guild tab.
i still use dumpster / TSM / Merchant Pro for bag management (8x 32 slot bags can only store ~7 character class's complete set of glyphs) & crafting glyphs in reserve & buying parchments & conversion of blackfallow ink
the milling/buying of mats, i use TSM to buy about 200 stacks of cheap herbs & now just HB+sitstupid+allrounder, and i idle in guild chat for 2 hours milling about 500-600 blackfallow inks or so to refill weekly reserves.
automating the buying/milling/inking process, is a godsend.
as for the inventory/profit allocation (i.e. what actually does sell), that's a bit tougher. i think there's a top 100 glyphs spreadsheet, and a list of the worst 28 glyphs on a website or 8.
the undermine journal or wowuction may have more detail about sales data over time though, as well as market averages across servers to use as a baseline.
Will it be worth to stock ink's until MoP?
Theory goes (from past experience with LK to cata) that blackfallow will become useless after 5.0.4, i.e. MoP, and the Ink of Dreams will replace blackfallow ink for older exchange.
However, once 5.0.1 drops, the unofficial pre-MoP patch, which might be in the next 3 weeks.,, They may actually, by accident, change the ink exchange vendor from BF to an IoD ink exchange vendor in the old cities.
which will be a problem without the skill or access to gather MoP herbs to mill. hence stockpiling of vanilla/outland/LK inks.
post MoP, i.e. september 25th and 26th,
From 525-545, you mill stacks for the ink of dreams (and starlights). after that, you'll be fighting RNG for glyphs you can learn to skill up, and to stack up on scrolls of wisdom.
The only way to learn the ~57 new glyphs is via the new "Scroll of Wisdom" daily quest, much like the 10g hand-in daily quest for scribes in cata, or northrend inscription research.
just like northrend research/BoGM, you learn a random glyph every day until you've got them all. it will take roughly, 2 months to learn all the new glyphs, the odds are, you'll be able to have your exclusive glyph for a day or a week (i'd be setting up TSM for 5K each, 20 of each new glyph), the daily quest/proc also gives you a soulbound token, you exchange for epic or BoA staff/off-hands, or darkmoon trinket cards.
you'd need about 200 SW's for everything, including BoA staff's and the DMC lottery/RNG to get a deck out of it, but the staff options you can create, are upgradeable and account-bound.
the epic crafting items will need 20/5 SoW "dailies tokens" (2h staff or offhand), and you'll need either 10 starlights +10 of a chaos orb equivalent, the soulbound "spirit of harmony", or 10 starlights and 1 daily token/SoW to produce the new DMF trinket deck cards. it will take months to get a complete DMC deck together. there may end up being trades for cards in guilds to offset this, but it appears to be a bit of a cash incentive for a while.
i.e. wowhead links to the starlight items
Starlight Ink - Item - World of Warcraft
sellable items include
ink of dreams / shadow pigment (and generally any MoP herbs)
starlight ink/misty pigment (the new inferno ink/burning embers for epic items/shoulder enchants, )
DMC cards, or the str/agi (tiger deck) /spirit (crane deck) /int (serpent deck) trinkets (and what looks like a +10% dodge on-use tanking trinket, so, you will never sell an ox deck)
a minipet (probably rep-restricted)
shoulder enchants (rare/epic level ones i believe, similar to tailoring and pants enchants, BS and buckles,engineering and scopes, etc.)
transmog versions of NPC-used staffs, the more popular inevitably is a unique keyblade "key to the planes"
Key to the Planes - Item - World of Warcraft, a staff that looks like a key.
low level MoP heroics level BoE off hands (int/agi) and 2h staffs (int/spirit/agi)
and some new cosmetic glyph options, instead of the standard "damage increasing glyphs vs useless glyphs" from cata.