There is no guide for this because it depends on the ninja's role in the team. Most players base the mood from the stats growth. For example, the role of my Killer Bee SST is to provide shields and buffs only so I mooded him +Res -Atk for more shield. If I will change his role to be a damage dealer (which is highly unlikely) then I will mood him +Atk and -Res because he is immune to debuffs so no need to worry about poison and ignite unless opponent has immunity removers like Kushina Habanero. It all depends on the role of the ninja in the team.