These posts actually made me laugh - there seems to be a lot of miscommunication (or rather, thoughts LOST in communication). Let me try to boil this down a bit:
Kitaen is saying the "ideal perfect world" rotation would be to liberally spam FR until 3 stacks since this would logically lead to higher DPS, and he is saying that some times he cannot do this SINCE he would be rage starved if he did so. He was initially asking if the CoF trinket allows for a higher level of liberal FR usage with ring, gloves and 4 pc (FYI I don't know since I don't have gloves or CoF).
Upon reading his post, Tatsujin seemed to have zeroed in on the term "rage starved" and thought THAT was the issue (not the CoF trinket) and tried to help by saying that the CURRENT optimum rotation to avoid rage starving is to conservatively use FR.
I guess the major miscommunication is what both of you believe fits the term "optimum rotation/use of FR." For Kitaen who parses high and is pushing for endgame, his "optimum rotation" is an "ideal" rotation where one could spam FR liberally; whereas Tatsujin is saying that the CURRENT optimum rotation is conservative use of FR. The other point of confusion was the term "rage starved." Tatsujin (and most people) would assume being rage starved means running out of rage, but Kitaen's definition is rather not HAVING enough rage to liberally spam FR and having to hold back (and therefore affecting DPS).
Pretty entertaining overall...