iso answers pls

Yes

whats the breakpoint ?

Use d2warren ias calculator because you’re not giving any details like fana level, or weapon base.

this

yes

smite uses ias, not fcr. it’s treated as an attack, so your speed is based on weapon base + ias, not cast frames

what matters is hitting the correct breakpoint for your setup (weapon, fanaticism, gear). once you’re at max smite speed, more ias does nothing

so answer is yes, but only until you hit your breakpoint