There should not be any set roles other than Osuna in the 9th and Lowe in the 8th.
Sanchez is a guy you bring in if you need the groundball.
Hendriks is the guy you put in if you are facing righties (although Lowe is good too, but I want him in the 8th)
Cecil is the obvious choice for lefties
Hawkins is the 6th inning guy you throw in when you have a +4 run lead, or someone you put in to stop the bleeding if we're down 3 runs
Everyone else there is mop-up duty.