Infraction: 10. Do not respond to terrible posts.
Message to User:
If quoting an existing post in its entirety and adding no additional content is a valid answer to the question, the question probably doesn't need to be answered. Consider reporting instead of replying.
Furthermore, if you equip it in the spreadsheet and then go to reforge it, it lists the "old stat" as 570 mastery, which is obviously wrong, but would probably explain why this trinket has suddenly jumped to the top of the list.
While we're on the subject of trinkets, are there any plans to add the Brewfest trinket? My gut tells me it's not an upgrade from Fluid Death, but I have to admit that 4000 AP proc did get my attention.
Well, as I recall Mirror of Truth had a 50 sec ICD and a somewhat lower than usual proc rate, so it procced once every 55 seconds or so on average; assuming CCCC is the same, it would have uptime of about 18% and thus provide an average case ~730 AP. Add in the 340 crit rating, and you get a trinket worth less than 1100 EP, which would make it... terrible. Taking a quick glance at the Combat and Assassination guides, there are blue trinkets better than that. If this estimate is accurate, it is only of interest to people geared primarily with 5man non-heroic blues.
Definitely not worth it.