Maybe for the debuffs, just lower their tick damage by 1 and you'd be golden; it still grants complete immunity to On Fire, but halves Cursed Inferno's damage and cuts Shadowflame's by 20%. That way, you can't erase both debuffs from existence before you even get to them.
Bad idea train, passin' on through: you could throw a nerfed F.P. Charm into the Lava Waders (Water Walking Boots + Obsidian Skull + Obsidian Rose + Lava Charm).
•Ability to walk on water, lava and fire blocks
•10 seconds of immunity to lava
•Reduced damage from heat sources (37.5% reduced damage from lava, 20% reduced damage from all other heat sources)
That's definitely way too much on one item, but it at least solves your obsoletion problem. (Thinking on it now? You could probably also throw the Ice Skates in there so you can just walk on anything except Honey unhindered while also getting that Icefire combo
View attachment 231293).
Yes, I know the boots DO also allow walking on Honey, but honestly that makes no sense.