It is possible they might start with Arrieta off the roster. He can even be optioned to AAA this year as he does have an option. I don't think he could make a AAA start without the option and he would be limited to extended outings unless they could justify a DL/conditioning stint.
If that is the case they go with an 8th reliever along with 4 starters until they need the 5th. And then they make a decision on Kingery a week or two after that. The weakness of the above roster is only one LHP.
If we get an early recall of Kingery I think it almost guarantees that they go with a 4 man bench. Catcher, Williams, Kingery, Valentin or Quinn but not both.
C - Alfaro, Knapp
IF - Santana, Hernandez, Crawford, Franco, Valentin, Florimon
OF - Herrera, Hoskins, Altherr, Williams, Quinn
SP- Nola, Velazquez, Pivetta, Lively
RP - Hutchison, Neris, Neshek, Hunter, Morgan, Garcia, Ramos, Milner
After 10 days Arrieta comes up, Florimon or Valentin goes down. When Kingery comes up, then either the remaining IF or Quinn goes down.
Short bench works for Kingery because it assures him getting more playing time and the other players have options. Whether they keep one of Valentin or Florimon on a short bench really depends on how they see his SS defense (or Cesar's).