I really think you best bet is to play around with itasoftware. Do a month long search for flight to IND from PHX with one day return and see what comes up. To get more segments use this code:

PHX:: O:NW O:NW O:NW+
IND:: O:NW O:NW O:NW+

(This will force at least two connections both ways only on NW metal. It will also show you 3+ connections if it is cheaper)