Setting up which targets to attack in order helps a bit since then its mostly just healer aggro you have to worry about. It isn't really that difficult, rather more of the same of what you have been doing since before you got Sword Oath, only now you have a little more power to help keep enemies on you. Yes it is somewhat strange even before you throw in WAR getting their tank stance 10 levels earlier, but it isn't quite that big a deal overall. There shouldn't be any mass pulls being done before 50 anyways leaving mostly wandering mobs as the big problem when it comes to "alot of enemies".

Note this is coming from someone who started out as a GLD/PLD and was also the first job to hit 50.