Could anyone clarify if TF remained the 6 sec duration? if it did it will be one more ability that you have to time to fit your cycle so you get maximum benefit out of it.
See no reason for a duration change.
DPS Cycle will be:
Trinkets on rip > Tiger's Fury on Mangle > Shred.
The only difference is you have to avoid powershifting while Tiger's Fury is up. A simple modification to FeralKit to check for existance of Tiger's Fury before cancelling form will work.
Also, every third cycle, you will be waiting for max energy rather than powershift like a mofo.
*edit* Another finisher to a cycle is too much. Assuming perfect crits and doing 4CP Rips and Ferocious Bites, even with 2pc t6 bonus, 29 energy mangle, 3x 42 energy shreds, 30 energy rip, is already 185 energy. You also wouldn't be able to powershift enough and build combo points due to having to wait a tick for each shred and the constant gcd's.