Seems a strange one to me. Good for him to get game time at a good club, but I see him as an important part of the squad and expect him to be needed alot this year.
If Shaul doesn't travel then the most obvious option is to put Carlos at full back and shuffle the back line about, but if Fonua is out then it starts to look a little makeshift.
For me it would be Carlos, Lancaster, Talanoa, Logan, Michaels. However I can see Radford just bringing Yeaman in.