In my mind, Petaia , Kellaway and Wright, are all wingers who can play fullback. All had way more success at the international (and super) level on the wing, but because our only true fullback option is Jock Campbell and now an old Kurtley Beale, we have moved guys across from wing.
Granted, all three are now playing fullback for their super clubs, but it's tough to say they are better there. So, I would rather the triple threat of Kellaway and Wright (run, kick, pass, although Kellaway could do better on that front) than the outright pace of Toole at the start of the game. I'm not sure Koro's coming back anyway, so it might be Toole, Kellaway, or Wright.
But what would I know, I'd assume probably be Kellaway, Marky Mark (Nawaqanitawase) (Nawaqanitawase) and Koro..