Volcanic fissure help

Ive been trying out Volcanic Fissure of Snaking.

My dmg seems to be really low and i cant figure out why.

Only thing i could find is:
- A warning in my POB that i dont have enough unreserved mana to cast my warcries.
- I dont seem to be taking any self damage in the "Skill type-specific stats"

My conclusion is that im somehow not exerting my attacks and i cant for the life of me understand why.

If somebody can see what i did wrong please do. Cheers

POB:

https://pobb.in/mCdO3gJBz5Nh