Anything that says physical damage, from weapon to even necromancy, they get more damage with warfare.

Look at your weapon too.

Let's say
Physical 20-30
Fire 5-10

It will now scale with both Warfare and Pyro.

But yeah, get tons of warfare first. 10 Warfare rush after 2 or 3 into Huntsman/scoundrel for skill unlock is the highest damage build. Add in huntsman effect or scoundrel crit for more damage afterward.