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Characters with Synergy (11)
Ranged warriors: 3 (Veserod, Anders, and, after learning crossbows, Daniel)
Melee warriors: 6 (Gullveig, Kalentia, Rohey, Anselm, Renold, and Eir)
Mages: 1 (Shino)
Cooks: 1 (Ilva)
Ilva is a special case, as her synergy only works with Renold. In most situations, I think they will affect each other. The only exception would be if Renold doesn't have plans to take the lead.
As a result, we have 1 character who is not affected by anyone and who does not affect anyone else. Unless Renold takes the lead and Ilva is not in the battle, in which case the buff will go to him.
In total, we are left with 4 ranged and 5 melee units. Eir will most likely take "Assault." Locken can take "Retribution" relatively safely (although "Leadership" is not a bad pick either), as he can move and shoot at the same time. I see a potential combo here if the character choice is not determined by the GM. The three Artherians will most likely take "Prayer," which is best used on another melee warrior. We have three good candidates: Rohey, Gullveig, and Kalentia. The others are too fragile. Gullveig and Kalentia can form a duo where they pray for each other, while Anselm will pray for Rohey. In this case, Rohey will be left with the choice between "Retribution" on an Artherian or "Motivation" or "Assault" for someone else. Shino's spells require a lot of initiative, so I wouldn't advise her to take "Assault" or "Retribution." But I think Nebok was already planning to teach her "Motivation." And it is unknown who will choose her as the target for their own Synergy effect. It is possible that the character described above, who is out of the picture/buffs Renold, will be her. There are a couple of crossbowmen left who cannot kite and have the same firing range. Perhaps it makes sense for them to each take "Assault," as it should be easy to stay close, and there are no other free "slots." Unless Rohey chooses an Artherian as the target for "Retribution." Of course, everything written above is by no means an instruction on what to do, what to take, and who to buff, but rather just reflections on a working concept with maximum Synergy, which may not even be that accurate. There is no argument that we will always fight with the entire "united" team. In other words, I wanted to see how it might look in practice, and my verdict is that the system is more complex than it might seem and becomes a little easier if the characters are divided into pairs.