Because if you Mangle before Rip, the Mangle will wear off before the last tic of Rip, meaning you'd have to mangle twice or lose the +30% Rip damage, of course, you lose even more damage by having to mangle again (depending on armor) So it's lose-lose with mangle before Rip.
Once again, without counting crits or procs...
00:00 (100)
01:31 Rip (70)
02:00 (90)
02:31 Mangle *1* (50)
03:31 Shred *2* (8)
04:00 (28)
06:00 (48)
06:01 Shred *3* (6)
08:00 (26)
10:00 (46)
10:01 Shred *4* (4)
12:00 (24)
13:31 -Rip
14:00 (44)
14:01 Shred *5* (2)
14:01 -Cat Form
14:31 -Mangle Debuff
15:01 +Cat Form (40)
16:00 (60)
18:00 (80)
20:00 (100) *Repeat*
Also, we REALLY don't need 3 threads about Catform DPS. Most of this thread could be safely merged with the
Feral Druid DPS thread