the 880 to 890 will be siming nearly the same
but the 890 to 895 will be a minor dps loss.
+ CoF is not a good trinket and you should avoid it if you can.
Caith made a very good Post about that:
https://docs.google.com/document/d/1...t-73H_0SU/edit
His final Note is: The lowest CD achievable without using Delusions is 2:28 (3 Relics + CoF).
This is with 4 Points in Traits and 3 Relics. Nowhere near 2min. My advice is: don't got for it. It will also take a while until you have 4 points in the traits:
http://i.imgur.com/cjMpSFQ.jpg (ye you could skill it 2nd but not worth it imo)
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If you would have Delusions, you could get to 2min with anger and 2 relics but when Tomb of Sargeras hits you'll most likely want to have 2set T19 and 4set T20. In that case you would have to ditch Delusions. But they might disable T19 Boni somehow...