Looks like you want to run more of a semi-gc build then (similar to what I run, works wonders, especially against unsuspecting gc thieves). If you want to run more offensive traits I suggest using Axe/Focus/Dagger traited for 30/0/0/10/30 with VI VIII and XII in spite, V in blood, and then III V XII in soul.
Reapers might will be good because your main form of auto-attacking with be ds 1; Axe training is nice because Axe 2 is your ranged burst (and also continues to hit thieves after they stealth if you start to channel when they are visible), and Axe 3 gives retaliation; Close to Death is really nice because the 20% extra damage applies to all of your damage sources; Vampiric precision is good because you will have a high critical rate, especially in ds, so being able to get health back constantly is really nice; Path of might is fun because everyone loves cd reduction, especially on ds 3, 4, and 5; Speed of Shadows can be swapped out with Unyielding Blast or Close to Death, I just like having 25% faster ms in combat to give me a little edge on melee classes; and finally Deathly Perception is great because 50% critical while in ds will bring you close to 100% chance, which means heavy hits that increase each time from might, possible vulnerability on them, and give you health back.
For utilities I run Consume Conditions as my heal (always good to use), Well of Suffering for close-proximity damage and application of vulnerability, Spectral Armor for a stun break that also gives protection, and a situational utility that normally switches between Blood is Power for might and a small bleed, Corrupt boon if I’m facing a boon stacker and I’m feeling lucky that it will actually work, and spectral Grab for pulling people off of walls, or grabbing people that are running away from me if I’m feeling even more lucky than using Corrupt Boon. Elite I mix it up between Lich Form and Flesh Golem depending on if I want knockdown for burst, or knockback + annoying minions + piercing shots from Lich Form. Hopefully sharing my thoughts and reasons behind a serker build helps you decide if you want to mix anything up or not depending on your play-style.
Edit: Axe Mastery can also be swapped out for Chill of Death if you find yourself using dagger, ds, or Lich form a lot more than the Axe, as the free chill/boon rip/damage when they hit 25% hp is also very nice.
