We can (and probably should) fall back a smidge, but the timing of our initiative makes it a little challenging. I'll take a swing and try to kill the kobold in front of me and then retreat to Q9, drawing an OA from the other kobold unless someone otherwise kills it. Shouldn't be that big of a risk if I kill his ally since he won't have advantage then. The kobolds will have a turn, but I'm not sure how many of them will be able to move and attack, they'll probably have to dash just to get into position. Then Hunter goes, he can move into N8 and hopefully get sort of surrounded. Remember that the way that Hunter's ability works is that allies get advantage on melee attacks against any creature within 5' of Hunter, so we don't have to be adjacent to him, just to a creature to which he is adjacent. Then Jeni comes charging up the center aisle to make life unbearable for the bad guys. Carad and Venn continue sniping.
If we can bring the fight inside the church, it should reduce the number of incoming missile attacks against us given the walls and limited maneuvering (in theory).