My "Oddball Hybrid" Warrior & Improvements?
I suggest you to drop Defense line completely, since you running bers glasscannon anyway, and best defense for you is stay in range. Take more Arms and Strength traits, maximize your rifle damage, always be in second line. Here is rifle-focused berserk build:
http://gw2buildcraft.com/calculator/warrior/?8.0|c.1c.h4.e.1c.h1j|4.1g.h1a|1g.7h.1g.7h.1g.7h.1g.7h.1g.7h.1g.7h|4s.0.1g.67.1g.67.1g.67.1g.67.2s.0|f5.p17.0.a1.k56|39.1|5y.6d.6e.6f.6m|e
But i must warn you, warrior bers builds in WvW are mostly for fun. If you have plans to improve, use bers-greatsword build to farm CoF (just switch rifle trait in Arms to greatsword one), buy Knight or PVT gear and begin try heavy-armored melee builds with Defense traits.
25 charracters
At lvl 80 there are better options then signets. The shouts and stances are better you just have to figure out which ones suit your play style best. Healing surge for instance grants alot more healing then the signet. FGJ and OMM shouts are fantastic insti-casts to buff you. I still use sig of rage for more crit chance and might but it is easily swapped out for the banner when its needed. Ifyour rolling the 40+ for each unused sig you can still get good return running only 2-3 sigs.