1) Why would we bench the OL who is playing better than any other OL? Robinson can't pass block. It is really that simply. We could start Sow or Jordan at OG. We are NOT forced to start Robinson, presuming that Sow is healthy. (We are not even forced to use Robinson as the primary backup OG. We have Leverett and Thomas.
2) Yes, we should play Wallace at RT, not really out of necessity, but rather to see whether he should be starting this year. If not, he is the backup RT and also the jumbo OT and Onwenu would need to again start at RT.
BOTTOM LINE
Presuming that all are healthy, by Game 6, I don't expect either rookie to be starting by necessity. even if Strange isn't back.