I've been farming Devilsaur skins for my rogue alt, and I was wondering if there was an add out there that would auto target for you instead of having to spam a macro manually all the time.  Or if there was a way to make a macro that would continuously spam itself.  Any help would be appreciated.

No. That'd make the game too easy. Basically sounds like botting. lol

Not really.  You would still be playing.  It just lets you know if something you are looking for is in the general vicinity.  Riding around and spamming my "1" key becomes pretty monotonous after about 5 minutes. 

Oh, well, You can make a macro that says "/target mob'sName ". It can be a partial name, for example if i'm looking for defias highwaymen or defias hunters it would just be "/target defias"(without the " " of course).