Well, you're enchanting the Ebony Bow as well, and should you choose to have followers you're also enchanting their gear.  

Look, I played through with enchanting and it worked for me. Should anyone choose to play this build, they can swap out enchanting for smithing if they really want to. It's up to potential players if they want to follow the build to the letter or make minor tweaks here and there. It's up to them, and I respect that. 

I'm not trying to sound like a dick if that's what I'm sounding like right now, so sorry if I am.