Unfortunately I don't play Feral so I can't give any strong advice in this regard. What I can tell you is that there are two core PvE Feral builds: one for tanking and one for DPS. You can mix and match to a certain extent, but to be the absolute best, you have to make choices.
There are no Balance talents worth mentioning, but a good Feral build should try to include Furor, Naturalist, Natural Shapeshifter, Master Shapeshifter, and Omen of Clarity from the Restoration tree. Unfortunately, that's 16 points down the drain so you'll have to make some sacrifices, especially at 70.