Helium adds nothing.
Shooting a Boron eleven nucleus with a proton takes a steady eye. Putting Nitrogen up as a target might get interesting results, but the whole concept of aneutronic fusion is to break up individual atoms into what can be perceived as their constituent alpha particles.
Oops!, I meant Hydrogen.
Create a hydrogen plasma and you have a bunch of protons floating around, and at least one of them will get kidnapped by the Boron................