Now Pairing or teaming up, i think should be allowed, but not to make it a lifetime, for example, a player getting little too deep with monsters on him/her at once. If your notice this, and are a helpful minded person unlike me, then yes i believe you can help that other player, but forming long laster teams, should be forbidden. Few hours of play i can see, but its like anyone on this forum yet, stays playing with another player. Even as we did Seiitsu, we teamed up, for the massacre, but soon departed. Which I see that as a allowable teaming up.