Character Controller

So this is a really stupid question, but I have a zombie in my scene. He has AI and does a loop around the building. I want to know if I should have a Mecanim tree and script his animations through that or would it be smarter to just only do code and call the different animations.

since it does not do much i will recommend calling the animations through scripting, unless of course you have a lot of plans for the zombie character and it is not a stupid question you need an advice and advices are as good as answers
happy developing