mount motivators
Bfa tailoring flags (only work in eots)
Dmf daggermaw for food you can cook unsubbed
Some type of grenade, mithril fragbombs are awesome and my go to, arcane bombs are overkill and expensive but do what they do, hi-explosive are cheap
Enchant an heirloom cloak on every toon with Feathery Spellthread (BFA tailoring 75skill enchant) reduces fall damage. For people who are not unsubbing just transferring s toon they can use a white/grey or bug something
get your fishing skills to like 130ish if you are gonna not sub for a long time, DMF fishing gets you your food, and you don’t want to be fishing up greys at 100 skill.
Elixir of tounges in bulk. I don’t see enough people using these
Jumper cables on non res toons. Gnomish battle chicken, parachute cloak, gnomish rocket boots on everyone. Gob Bomb dispenser if you wanna go all out
surface skimmers(not sure if they work in bg)
Buy a mount equipment on each toon if you never did (for traveling to places out of instance)
swapblaster on every toon
Swim speed potions, water mount
gold. If you have the ability to leave 200k on a toon there’s your excuse for 24 hours gametime in the future.
https://www.wowhead.com/item=166750/draught-of-ten-lands - 10mainstat 10 stam, buff is kept on in arena/death
I think that should cover most of the obscure before-unsub power related stuff not already mentioned... there’s lots of fun vanity items. Some reusable like ominous pet treat, guild banners.