Felwood, Winterspring and Eastern Plaguelands should get you a good way from 53 towards 60. There's a decent number of non-collection quests in each area if you're still looking to bridge the gap to EPL you could add in Un'goro and Silithus. I didn't really touch EPL, Silithus or Un'goro with the druid pair but you'll be missing out on kill experience since you're running them with a higher level (and have larger group).

-Stav