Was Mithras the model on which people created the Jesus myth? The short answer is no. But for a bit more information, go here for a conversation between Lee Strobel and Edwin Yamauchi on this topic.
One of the people in the apologetics field that I respect the most is Brian Auten of Apologetics 315. Brian spends a lot of time providing resources, as well as interviewing a wide range of apologists. I was pleased to see that someone thought to interview Brian. Lee Strobel interviews Brian on the current state of apologetics. I found Brian’s observations to be insightful, balanced and well worth paying attention to. You can find the interview here.