FE7
My first playthrough I early promoted everyone as soon as they got to level 10, except the lords (I didn't know Lyn and Hector could promote). Most of the team died on Victory or Death, so I had only a Lv 3 Marcus, A 12/1 Oswin, Wallace and Isadora along with the unpromoted Lords for the final chapter. And Athos died to Uhai on the first turn.