This is intended as a discussion and would like to exercise it as such.
I feel with the damage nerf the magdk will take in the upcoming patch the above idea would definetly help...
Yes it has been buffed back up a little, but we are still going to hit less hard than in Elsweyr and regardless we will still feel this nerf greater than other classes .
Biased yes, but i felt damage in Scale breaker we were actually comparable to others in terms of overall damage(feel free to disagree).
I felt competitive with everyone and was nice to see the attrition style take faster effect.
The cost increases despite the changes to combustion are still lacking and will mean we need to invest more in to sustain and less into damage.
This means not only are our DOT's weaker, but so is our overall damage.
I feel considering this passive already grants minor brutality and stamina costs are far less anyway. it is only right to add this.
This is now always active for a stam player if they choose to use the spammable and let's be honest its looking mighty fine so why wouldn't you

.
I also feel it would work nicely into our rotation given that in PVP we would try to immobilise during our attack i.e fossilize.
In PVE Molten armaments is utilised i believe? again correct me if i am wrong