The Elijah/Elisha accounts contain a great outpouring of miracles the likes of which hadn't been seen among God's people since Moses, and would not be seen again until Christ. It is altogether proper to see Elijah/Elisha as a preview of Christ on a level similar to Moses.
So why do we have both Moses and Elijah/Elisha? I like to think of it this way:
There are two sides to our sin problem. Sin is both rebellion (we are disobedient to God) and it is bondage (we are captive to the devil and the ways of the world). Moses primarily shows us salvation from bondage. Elijah/Elisha confront rebellion, calling an apostate people to turn their hearts back to God. Together, they give us a preview of the final, all-encompassing victory over sin won for us by Christ.
That's not the only framework we can apply to Elijah/Elisha, but it's where I start. Amid all the other similarities to Jesus (resurrections, mass feedings, care for the needy, healing lepers) the most fundamental may be the call for repentance. Only in Christ is the full and lasting repentance Elijah/Elisha ached for made possible.
BTW... Ray Dillard's brief book, Faith in the Face of Apostasy, the Gospel According to Elijah and Elisha is excellent (and and easy read) on this topic.
PCA, worshiping with some fine Baptists in Colorado