Rather than bag Tesi at fullback it's time to start thinking about where else he could fit into the team. Reece will be fullback next season. Let's just take that for granted.
Kotoni is not going anywhere. On the other side we have Herbie, Deine and potentially Tesi fighting for the place. Herbie would have to be in front, but I'd be as okay with any of them as I'd be sorry to see any of them go.
Where else could Tesi play? I don't see him as a winger, but Deine or Herbie, maybe. Selwyn and Corey look pretty locked in out there. We have two spares. More, if you count Hoeter and Pereira, who I think are a step down.