Not sure if certain types are more prone to narcissism than others, every type has its pitfalls though, if not narcisissim then it's something else...

In any case, even if certain types are more prone to narcissism than others (like Se base possibly) it doesn't mean that everyone of that type is narcissistic, more that the narcissism tends to come out when unhealthy. But like I said all types have their pitfalls, "nicer" types like SEI may have some other issues when unhealthy, not necessarily narcissism.