Not at all. If you're running G/W, or any color combination involving green and white, you might very well prefer white mana from your mana dork instead of green. Arbor Elf is fairly often better, but if you need to accelerate your white mana instead of your green, Arbor Elf won't be any help unless you have a Temple Garden out - and besides their abilities are far too dissimilar for one to bebetter. And while you're at it, can you stop autocarding your entire posts and signing them like that? You even mucked up the names of the cards in question with capital "I"s so people can't use the actual autocard links. >_> Autocard is a tool, not your personal "I want to be special and SWAGGY" button.