Those 2 proc for 15 seconds each, and they have an internal cool down of 45 seconds each (starting from the moment the buff appears, so you are left with 30 seconds without the buff). The thing is that needle procs by doing critical hits so it might be tough to have them proc together to be on 1400(100%) armor penetration rating for 15 seconds, but yeah those 2 stack together.
PS: I would use Grim Toll and Mjolnir Runestone if I were you, or even better, Mjolnir and Banner of Victory
I'm pretty sure that they're both on a 45s ICD and yes, they stack. While my memory on the ICD is likely correct, I'm 100% sure that NES can only proc on criticals which makes is not as ideal if you get a better trinket and have to replace one of those two.
Having 100% arp 33% of the time with other stats lower OR having 100% of arp with other statis higher, which one seems better?
You'll get ARP on bis gear anyway, which will put you over the cap with trinket procs.
That is good for a gearing up, RDF farming player, but stepping into ICC even LDW10 trinket will outperform all of those cause they'll put you over the arp cap.
I'll use both trinkets you were mentioned plus Serrated Blades(3/3 %9 armor ignore).
So İ can reach 875 ArP(if when ArP Trinket procced ofc.) means %62.5 armor ignore. It is ok for me cos i can't reach hard cap with pvp gear. Thanks and cheers..