I'd say go with Clarine cause she has better movement which is always a good thing even though she has low defense her speed and luck growth might help her dodge attacks and make her live longer, the only problem with Clarine is her pretty low magic. Saul's problem is his movement so sometimes he may not be in range to heal a person and his low luck+the one rng in this game might result him in getting critted and killed, his support option is not too bad its just that he supports people that you would not want to use most of the time, but if you want to use both that's fine too.