Here's my map of Indiana. It destroys Donnelly's district and puts him into a district with Stutzman. It also prevents a Baron Hill comeback by combining Bloomington with Indianapolis exurbs instead of the southern edge of the state. Pence and Young switch district numbers (Pence, who lives in Bartholomew County, is now in IN-09, and Young, who lives in Monroe County, is now in IN-06), and IN-03 is an open but very GOP seat. Ellsworth's district is mostly unchanged, so he maybe could mount a comeback, but otherwise I think this is what the Indiana GOP will do.
I'm assuming the white suburbs in Lake County (in IN-04) are mostly marginal or GOP-leaning; the map might need some modification if they are not.
I think your division of Lake is fine, but in LaPorte the Westville area tends to go Dem IIRC.