Idea, everyone, go ahead and make a meister AND a weapon CS. You can still choose to only play one of the two but this way, you have a back-up should one of you get screwed over. 

Now, if your partner dies, you'll have a spare meister or weapon to get transferred in.

I mean, how you survive the intermission between losing your partner and getting a new one is still up for debate but I think you'll be fine.