Leafa and Shota can both play 80 minutes.
Ah-Nau has trained and played at hooker at lower levels, and so would be capable for the 10-15 minutes required for blood, concussion, or cramping.
For the Brumbies and Bulls games, injuries, excluding long term ones don't matter. You could probably extend this to the whole South African tour, while you need 8 front rowers, signing a player just for that is useless.
So... the only scenario I could envisage in that Fualau would have been required is if one of the Front Rowers sustains a long term injury between now and the South African tour.
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