In this build, everything is indicated to the maximum, there is nothing more to improve. Well, yes, you can find a better drift mod. But this is Real destruction of the cannon itself.
If it's more convenient for you to play with another hoaxer, I also advise you to put Primary Deadhead
If you put a hoaxer on the firing speed in your warframe. Then this build will bypass any other on this site.
I apologize for my English! :)