If you are still looking for a method how to do this:
Power Auras is my preferred buff tracking addon.
Fury of Angerforge Power Aura Strings.
Trinket activated
Code:
Version:4.9; icon:INV_Misc_Head_Dragon_Black; buffname:Forged Fury; begin:3; x:-94; groupany:false; unitn:Only for raid/group.; alpha:1; owntex:true; speed:2; combat:true; size:0.18; y:-240; texmode:2; finish:3; timer.HideLeadingZeros:true; timer.enabled:true; timer.cents:false; timer.y:-273; timer.x:-92; timer.Transparent:true
Hidden one that enables rest of the auras to work. (Shift click it so it says "off" over it. It should be off when you import it but double check)
Code:
Version:4.9; icon:INV_Misc_Head_Dragon_Black; buffname:Forged Fury; begin:3; x:-94; groupany:false; unitn:Only for raid/group.; alpha:1; owntex:true; speed:2; off:true; combat:true; size:0.18; y:-240; texmode:2; inverse:true; finish:3; timer.HideLeadingZeros:true; timer.enabled:true; timer.cents:false; timer.y:-273; timer.x:-92; timer.Transparent:true; timer.ShowActivation:true
Hover your mouse over that aura to see it's ID. Enter that number to all the auras below in the text field right of "Exact name". This is important and sadly it can't be exported cause the way aura IDs work.
Stacking phase background icon
Code:
Version:4.9; icon:warrior_talent_icon_furyintheblood; buffname:Raw Fury; begin:3; x:-94; groupany:false; unitn:Only for raid/group.; stacks:1; alpha:1; aurastext:1; owntex:true; speed:2; combat:true; size:0.18; y:-240; texmode:2; finish:3; timer.HideLeadingZeros:true; timer.enabled:true; timer.cents:false; timer.y:-273; timer.x:-92; timer.Transparent:true
Number of stacks written over the icon.
Code:
Version:4.9; icon:warrior_talent_icon_furyintheblood; buffname:Raw Fury; x:-95; stacks:1; aurastext:1; stacksOperator:=; textaura:true; size:1.49; y:-240; texmode:2; finish:0
Copy the last one 4 more times and change number of stacks that activate it and text that it displays (stacks:1; aurastext:1 to stacks:2; aurastext:2...etc).
Edit:
Master Guns has a history of very terse comments towards other players, in all honesty I would pay little attention to most of what he states.