Actually, with Kenjutsu (you still using a Bow) you could use your element combined with your arrows, but you just won't be super good at actual elemental ninjutsu. You can only use lightning in combination with your arrows, which technically you won't really need an element for. As for using lightning for Speed, that's more of a elemental ninjutsu/taijutsu thing. The Raikage does something like that, which is an S-rank jutsu if I believe correctly.