This Five Guys strategy works great ... in a world of perfect health. The Twins do not live in this world.
Setting aside a pair of catchers, you have 11 position players for 8 spots. If you're devoting three of those spots to platoons (let's call them the Six Platooners), then you sure don't have much margin for injuries. If one of the Five Guys goes down, it's safe to assume whomever is getting the call from St Paul won't be trusted to fill their Five Guy role, so one of the Six Platooners (or the other catcher, which opens its own can of worms) have to be able to fulfill it. Roster limits require it. So it's bad news if none of the Six Platooners can handle a Five Guys role. Painting yourself into this corner is how you end up with a short bench, suboptimal bench options, and a team pinch-hitting OPS of .541. Not an ideal result for a team that pinch-hits like it's going out of style.
In a sense, the Five Guys position player slots (great name btw Riverbrian) have something else in common with a starting rotation beyond the number of slots: you need at least 7 you trust in the role to really be secure. If you have seven "Five Guys", now you have some roster flexibility in the inevitable event a top hitter has to go on the shelf.
So, whomever they have earmarked for a Six Platooners role in Plan A (no injuries) they need to:
a]identify who they most trust to fill a Five Guys role, and
b]GIVE THEM A CHANCE TO FACE SAME-SIDED PITCHING so they can be prepared when they need to step up into a more prominent role