That means he should be back after the wrestling book
Probably.... BG #17, Mirror Mirror #18, wrestling #19, Denarians again #20.
Unless the splitting of PT/BG has changed the plan. But even if so, BG is basically the stuff that was meant to happen in the second part of PT when it was all book #16, so still no Nicodemus IMO.
I think all the swords can cut through Titanic Bronze,
Come to think of it, you're probably right. I was thinking that while the Swords remove supernatural advantages, the actual metal armor (even without its magical properties) might still block the sword on a purely physical level.
But the fact that Sanya "coincidentally" showed up means he Should be here, so it's likely.
And I think Michael cuts through a steel door in SmF. So "on mission" maybe the Swords can do more than just remove supernatural advantages. (In that scene Amoracchius also casts a light that destroys the Hobs...)
Marcone doubtless has more bullets, but they may not physically go through the Bronze either,
Yeah, I really don't think so. I really doubt Gard's runes are good enough to break through god/titan level protections; Even Hand implies it might not have worked against Mag's shield without wearing down his energy reserves first.
Even physically... well, bronze isn't that great of a protection against bullets or militaries would still use metal armor, but Titanic Bronze might be super-good on the material-properties level even if its magical abilities are countered. Etri sounds like he's saying the alloy itself is special.
Even Hand is I think quite important
I agree - for the fights against the Fomor army, but not so much Ethniu herself.