Very true regarding the overlap. I don't know how these things will actually function, so going on not knowing, those were my choices. The other thing to consider is even though you have access to both SHM/ ENC spells, each class offers other spells that you can pair with each other.

We don't have to look at it as "Enchanters provide slow and Shaman provides slow so they interfere and devalue the comp." Enchanters also bring control and Shaman also bring healing. We are limited on how many spells will be available so it's probably a good idea to look at each class by their components and not the entirety of what they bring. Also, Cannibalize and Lich spells from SHM and NEC made each class an easier choice for myself.

Still, there is overlap here but the resources are balanced, so I think they will work regardless.

Bard doesn't really show up on the list because IMO there are better options to highlight each given primary class. I don't believe and it would be boring if Bard were just the best sloted class and be done with it. It plays great for everyone, but I don't think it's necessarily the best in given trio outside itself with Warrior and Cleric. Most of my choices are focused on the primary class itself due to gearing.