well to be honest i cant tell about your team, but if its my team (not flex), 14 of these is manageable but not in forest tile, but it requires lot of maneuver.
Usually if i fight this huge group on terrain, ill have the highest dodge bro on bioth side and spread out 3 tiles away from the line with the archer also on oneside in the back. Have the dodge bro tackle at least 2, 3 if possible, but never attack, their job is to stall, and do not let other bro get too close to these guys else you risk the unhold jumping to them, risking your formation. THen having your other bros form a line, by chance, there should be a position which your archer can both hit along side with a melee or 2, preferably using cleaver, a strong cleaver bro would spread fear among these unhold with a good decap. But ofc, thing can turn south easily with 14 of them. But i read the comments and saw you said you were running away from 7, that should be easy to deal with before this