As title, does the -rr still work on boss since they won’t be trapped?
It applies before the reduction to the duration, so yes. But there’s always a butt, I mean but, it is not % reduced, but -%, so if the boss has 500% reduction to trap, it’ll be reduced to (500-x)%, so if x = 25, it’ll be 475.
Sorry I should be more clear about which -rr. I mean the one that -20% cold resist.
Since the boss won’t be trapped, will it still get -20% cold resist debuff?
No. Only when they’re trapped.
Well that’s a bummer, but to be expected.