I have made it to level 59 with my feral druids. I went through the first part of their Tier 0.5 quest chain and got 3 pieces of the Feralheart set. It helped to have a good amount of gold and leveled professions on my 4MP team to craft the items for the chain. The rest of the chain I will wait on until I can farm out the Wildheart set. Big pulls (>4 elites) are pretty challenging and I have to be careful to time healing so mobs do not run away. I start those pulls with the tank casting regrowth and rejuv on itself to help.