Esper Mental Link Game/Discussion(Spoilers in OP for NT 18)

So in the recent NT 18 Mikoto and Misaki linked their minds (Mikoto let Misaki past her EM defense) And Mikoto was able to amp her Railgun by borrowing some of Misaki's equations for controlling brain fluids and applying it to controlling liquid in a certain pattern on the surface of a railgun coin so that it would not only NOT burn out due to Friction but would increase in speed via converting water in air into basically rocket fuel to further repel the coin. (She was able to pierce the Windowless building with said technique which seems to not make much sense but whatever)

So it got me thinking, what are some different applications of Esper powers that might come from similar two Esper's combining and sharing knowledge/equations in a mental link? (It can even be for more than one Esper)

Thought it be a fun game/discussion to have!

So let's hear em!