Without RAF you are actually going to loose XP per mob as it's split and you are not getting a decent bonus.

So it will be alot slower leveling both toons but the quests will be a ton easier. Right now you should be focused on completing all quests within a zone and grind them out FAST!!

Go get Questhelper if you don't have it and just focus doing the quests as fast as possible and getting as many as you can. Also once you get Con with your paladin, quest and run into zones with tons of mobs and AoE them up. It's the only way to increase your leveling speed as you are grouped.