Well, CoF is not good on a lot of fights anyway. Only reason you see it so much on WCL is because varying kill times create a situation where it's possible for CoF to be better than any other trinket. Outside of mythic Krosus, it can be very difficult to ensure that CoF gives you any extra Crusade uptime, which means it gives 0 dps, (aside from the passive strength) unless it's creating some kind of other favorable lineup like synching Crusade to some kind of add spawn so you get better cleave.
In most situations, CoF is not good, especially in mythic progression.
In the future, please use the appropriate thread for assistance with DPS (it's linked in the "Need help?" sticky).
Closing.