A wider grip isn't going to do much besides irk your rotator cuffs. Don't fool yourself into thinking it's going to develop your chest more. Also, the three heads of the tricep don't need to be hit with individual exercises. More bullshit being passed around. As for the deltoids, no need for isolation work. Bentover rows and pullups will get your rear deltoids developed so you won't have to worry about that "hunched" look.
Now this may not be true for all bodybuilders who want their rear deltoids jutting outward, but you needn't worry about isolating them otherwise.