I did some research about the current form of the feral druid since last patch.
These formulas may contain some errors, I am open minded to correct the one you will find. The formulas are not easy to find so i tried my best to use the correct ones.
Any of these formulas are using mastery.
Déchirure (rip) : 113+320*5*1+0.0484*5*AP*1*8
Lambeaux (shred) : 500*weapondamage/100+78 (+20% bleeding damages)
Griffure (rake) : [ 1 + 62% of Attack Power ] then [ 5 + 310% of Attack Power ]
Mutilation (mangle) : ?? {500*weapondamage/100+78}
Ravege (ravage) : ?? {950*weapondamage/100 + 741}
Morsure féroce (ferocious bite) : 316+762*5+0.196*5*AP-685+762*5+0.196*5*AP
Balayge (swipe) : 400*weapondamage/100
Rosser (thrash) : 1232+1*AP*191/1000 then 5*(686+1*AP*141/1000)
Autoattack: min -max Damage Speed x.xx
Cat Top End = max / speed + AP / 14
Cat Bottom End = min / speed4 + AP / 14
for me
rip : 113+(320*5*1)+(0.0484*5*50198*1*8) = 113 + 1600 + 97183.328 = 98896 // normal : 232744 // crit : 479448
shred : 500*29109.5/100+78 = 145547.5 + 78 = 145625.5 // normal 43987 // crit : 106543
rake: 31123.76 then 155618.8 over 15sec // crit : 52441 then 262205 // normal : 25492 then 127285
mangle : close to shred
ravage : 950*29109.5/100 = 276540.25 // normal 105651 // crit 218860
ferocious bite : 316 + 3810 + 49194 (53320) /\ 685 + 3810 + 49194 (53689) // normal 68836 // crit 139785
swipe : 400*29109.5/100 = 116438 // normal : 39487 // crit 86347
thrash : 1232 + 9587 = 10819 then 38819.59 // normal 10587 then 80245 // crit 21765 then 165300
auto : Max : 10274,1176 + 3585.57143 = 13859,6890 // normal 22259 // crit 46057
Min : 6849.11765 + 3585.57143 = 10434,6891 // normal 17472 // crit 35856
The problem seems to be on the weapon damage.