Thoughts on a combined Crabshell/Immunity ring for one finger and Iridium Band/whatever for the other?
My ring spaces are precious. I'm not going to fill them with things that I can get in other ways. If I bothered to replace my Dark Boots (Remixed Mines Rewards, so no Space Boots), I could have the Mermaid Boots that provide a plentiful +8 Immunity, enough that I rarely get debuffed.
And when I do, it is be a fun challenge to overcome! I don't want to be overpowered, because sometimes it's fun to slow down.
Regarding Defense, I have +1 from my Infinity Gavel, and +5 from my hypothetical pair of Mermaid Boots. But it wouldn't really mind if I had zero, because that's what my food is for.
So no, I don't think that either a Crabshell OR an Immunity Ring should be a part of a regular set up.
But for a
super-specialised ignore-all-monsters set up? These rings shine.
With Crabshell (
+5 Defense)/Immunity (
+4 Immunity) & Crabshell (
+5 Defense)/Iridium Band, Mermaid Boots (
+5 Defense, +8 Immunity), and Gold-star Eggplant Parmesan (
+4 Defense, Mango Sticky Rice also works), you'd be on
+19 Defense and
+12 Immunity.
That'd be enough that you would be 100% immune and nothing in the regular Mines could hurt you (and only Tiger Slimes in the Volcano Dungeon with 23 Damage). Pretty cool!
But it gets better: if you're holding a weapon, then its Defense will be applied. The Dwarf Dagger forged with 3 Topazes has +9 Defense, so you'd be up to
+28 Defense! That eliminates anything at all in the Volcano Dungeon damaging you!
Plus if you wanted to kill a monster, chances are it's just one monster, so a dagger would be the way to go.
In Skull Cavern, only Mummies (30 Damage) and Iridium Bats (also 30) could hurt you, but they'd be doing only 2 Damage each. Cherry Bombs do more damage!
In the Dangerous Mines, only dangerous Shadow Brutes (max. 32 damage), dangerous Shadow Shamans (max. 30), and dangerous Squid Kids (max. 32) would have any effect.
Dangerous Skull Cavern would still be dangerous, but it would be more like the regular Skull Cavern.
TLDR: IMO there are better things than Crabshell and Immunity Rings to wear at all times, but they enable some pretty epic options that shouldn't be ignored.