There's no such thing as an "Explosive Arrow" ranger. Explosive Arrow is only a ranger skill in name. The fact of the matter is that, because its damage is completely separate from the stats of your character and the bow, it works equally well on ANY character build of any kind. There is no character who won't be getting the full benefit of Explosive Arrow.
If you're that keen on using the skill anyways, I'd build a different kind of character (or even a different Ranger, such as one that DOES use other skills), and level Explosive Arrow up too and use it.