Guild Wars 2

So running with Berserker gear in WvW is the thing for thieves but I can’t help but think i’m mising one important part. Took a time off in doing Fractals, WvW etc. and found that my off-hand dagger is but a hole in the concept.

Right now my dagger(s) and their sigils are as follows:
1. Mystic Spike of Strength
2. Centurion Claw of Bloodlust
3. Ghastly Dagger of Accuracy.

All daggers are skinned but all are berserker type. Their difference is the sigil. In WvW, The Centurion Claw of Bloodlust is not a good idea not unless i’d spent time killing off other creatures. The Ghastly Dagger of Accuracy was there to give me more crit chance but apparently I have plenty already to go by. Mystic Spike of Strength works great for me so its my main-hand. What would be a good sigil to use to my off-hand dagger?

you must give more details
Your traits ?
utility’s
and the food you use.
personaly i use Sigil Of fire, but i am more tanky