If the Riders want to host a home game, they need to win their 2 home games against BC and Calgary. At the very least they should win these 2 games and I expect them to win them. If they can also win in Hamilton, then first is theirs. Dropping 2 games to Calgary would be a worst case senario and would likely see the Riders battle BC for 2nd.
Deadline for season holders to secure their playoff tickets is Oct 16. I am optimistic that the Riders will be hosting a playoff game and I have my playoff tickets