great! Okay here are some of my ideas:

Flesh knuckles, Berserker's glove, and Hero shield: gives the player a small increase in max life, like maybe 10%. (Sorta like what the Calamity mod does with it.) If that's a little too strong, maybe you could reduce the defense they give a tiny bit.

Arcane Flower, Stalker quiver, and recon scope: inherits the additional 5% dmg and crit chance that putrid scent gives.

Molten Quiver: the flaming arrows it creates inflict hellfire instead of the regular on fire debuff.

panic necklace: also increases dmg by 5% for a few seconds as well when struck.

Hive pack: when near an enemy has the ability every few seconds to eject a few bees from the pack to swarm and attack them. Not sure if you could add a new mechanic like that but I think it would be a neat way to give the hive pack more use and functionality outside of the few bee weapons in the game.

Bone glove and Bone helm: maybe increase the dmg they do a *slight* bit, as the dmg they currently do at the point in game you get them isn't the best. (that might just be my opinion tho.) Also, maybe you could make it so they give a small dmg buff when entering hardmode to keep them sorta viable during early hardmode. (similar the the Abigail's flower summon weapon.)

Spore Sac: a new mechanic where if you touch the spores that spawn yourself, they absorb into you and heal you for 1-2 HP. I think that could be a pretty cool unique mechanic, tho like my hive pack idea, I'm not sure if you could make a mechanic like that.

Shiny Stone: cause the player to emit light, and gives the player a spelunker, hunter, and dangersense effect when standing still.

Flame Walker Boots and HellFire Treads: The fire they produce lingers a bit longer and can hurt enemies as well as setting them on fire. Hellfire treads would inflict Hellfire instead.

Flurry boots and *maybe* Frostspark boots: allows the player to run even faster on snow, similar to dunerider boots. Though, maybe don't make it as fast as runerider boots tho, do to how it's not as rare and a bit easier to get. maybe make the run speed about 45mph or so?

sailfish boots: greatly increased water mobility.

Those are all my ideas. Sorry if that's a lot of info to read XD. But let me know what you think! I'm glad I can help you out with my ideas.

Oh also btw, if you could, I think it would be nice to have a config file where you can enable and disable certain changes this mods does to all the equipment for more customization. but you don't have to do that of course.