Swap Evo goblin for barrel?

I copied this deck from API and doing well. I feel like I should swap the Evo goblin for the barrel Evo, so I can get guaranteed damage. Cause the goblin they usually kill it somehow or takes too long for poison to proc. What do you think? Ignore the levels, been boosting and working on that.

I copied this deck from API and doing well. I feel like I should swap the Evo goblin for the barrel Evo, so I can get guaranteed damage. Cause the goblin they usually kill it somehow or takes too long for poison to proc. What do you think? Ignore the levels, been boosting and working on that.