Here's the standard masteries. You can still make small changes to your personal preferences, but this is very close to the standard setups.
Standard Caster:You can also take Greed, Insight, Haste, or Blink of an Eye.
Standard Carry/Offensive:I'd say this is pretty much standard, you want the utility masterie since you're probably having Lizard buff as Carry.
You can go for a bit more CDR instead of Offensive Mastery and Brute Force if you want.
Standard Tank:Here's two different.
9 out of 10 times i go with Reinforce as a tank. But you can put that point another place instead.
Version 1:The only difference here, is that you're slight more offensive here.
Version 2:The only difference here, is that you're slight more defensive here.