in order to pull this off you need to make party for a clan member then invite them into your army. whenever army cohesion gets low simply kick that party out of the army and immediately invite them in again. it cost zero influence to invite a clan member into your army, yet inviting a party into your army increases the army cohesion. so by uninviting and reinviting a clan member, you will increase the army cohesion without using up any influence at all. kick and invite your clan member's party as many time as needed to get you cohesion high and you are good to go.