Someone has already shed light on this multiple times. Use the Search function to find answers.
I was hoping someone might be able to shed some light on this. While in cat form is there any disadvantage to popping Berserk while under the effects of Heroism/Bloodlust. I recall reading a while back that it was better to use them separately. However I can't find any info here to support that which leads me to think it not to be the case.