you might be able to make it, but you might need to spend some SCs on charisma/stamina refills. you need full affection for 2 50cc30 archers (bashira + soma/daniela) and 2 50cc30 healers (iris and alissa). probably should get a 50cc1 katie too at least; her upgraded skill should help with UP.

aff farming: challenge quests low cost battle 1 (silver spirits can be used to level up your silver units faster.), and if possible clear up to phalanx 2.