I REALLY like Boreham for punts. The Riders made a mistake, I think, by moving him. He is especially useful as a special teams tackler, which most punters are not. Also, he has a bit of an old-time attitude and likes to get his nose bloody and get in there and recover his own punts. Receiving teams need to allow for him in the blocking scheme, which can throw them off since its so unusual.
As for double duty--- McCallum or Prefontaine are both good calls. Don't think McCallum would ever willingly come back to Regina though. He had a bit of a crappy experience at the end.
Placekicking--- Congi is great when he runs hot, and average when he goes on a cold streak. DeAngelis may be good, but after the Calgary experience, even if he comes back, do you really WANT him in your dressing room? May as well bring back Van der Jagt if you want to go down that road.
Duval's struggles continue, and honestly, the PK role hasn't exactly been automatic this year, aside from the man in orange. So I guess that brings us back to McCallum again.
There you have it. Boreham for Punter, McCallum for PK, and either McCallum or Prefontain for double duty. Oh, and Suck-ota can be water boy.