Over the years I have commuted to the city by Bus, Train, Path from Harrison, by car parking at Port Authority, and drive to Ferry at Port Imperial (Weehawken). No one way is perfect. From West Orange I like the Path best. In general I love taking the Ferry. It is a great feeling on the boat as you view the skyline and feel the breeze on the water. Various buses are there when the boat docks to take you cross town and downtown.
Check it out: