Doom bolt worth using whilst levelling?

I have a chaos deceiver in elite right now and I recently ditched the points in doom bolt and instead switched to a focus on ranged auto attacks which seems to be going much bettter. I don’t get it usually if you have the MI for a skill you can breeze through MC but even with 2 of the DB guns it seems to just not do a lot of damage and cost way too much energy when you 22/22

Am I doing something wrong with my skills/devotion/gear I don’t really play a lot of chaos builds?

I already have a Mythical Harbringer’s grasp and Rah’Zin’s shoulderguards so I was thinking of playing touch of chaos anyways when I get to endgame. Devotion wise I think I will ditch viper for kraken and play the 2H crossbow that comes with Harbringers set.