Return of Reckoning

As question suggests. The leonine frenzy ability is pet damage and primal fury increases all damage that "you" do by 25%.

And no I can't check myself cos my WL is a mere lowby

AFAIK, they don't stack on pet. PF works on your toon, LF works on your pet. If PF worked on your pet, the description would say that like "for the next 10 seconds, YOU and your WAR LION...".