== Define best way. ==
i.e. What is the best car in the world? Kind of hard to answer without having a clear requirement.
== Define integrate way. ==
There are several ways to integrate with SAP. Again, what is your requirement? Did you want to send IDocs? Bi-directional or only inbound / outbound? Did you need to call BAPI? Did you want to call RFC? Does integrate mean having SAP call webMethods? What’s possible or not (let alone being “best”) depends on what you want to do.