Hi Guys!
What worked for me well is putting 3 fighters each in the left and the right part, and my two bishops in the back rank (I have 2 NPC's). If I'm standing before a monster, everybody can attack...
Has some disadvantages, too. My bishops begin every fight standing in the wrong direction, so are attacked from behind, which is double damage. Also, if you get surrounded, they are in no good position. Before that I had the two bishops in the middle, Bard and Gadgeteer and the back rank, one fighter with an extended weapon in the middle, too, and the other ones in the front. Was nice and safe, but now all weapons are short ranged (even my one bishop has one, pretty nice thing

), so I had to change something and am pretty happy with that.
Never forget your towel, cheers
Philipp