One thing that I always found absurd about the Ranger (and that your Swift Hunter does not address yet) is the "even if he does not have the prerequisites" part of the Combat Styles, combined with two hated words "light armor." Supposedly, the Ranger does not need Dexterity to qualify for his special feats, but that is hypocrasy when you limit him to light armor. Giving the shield proficiency after that is just adding insult to injury.

I suggest that the Ranger get a Wis-replaces-Dex (with a whichever-is-higher option) for AC, ranged attacks, skills, even Initiative (but limited by his number of Ranger levels). If that's too much as a package, break it down:
Combat Style archery includes Zen Archery
Combat Style two-weapon fighting includes Wis-to-AC
Combat Style shapeshift gets Wis-to-Initiative while in Predator form
[as with Zen Archery, these latter two would be a whichever-is-higher v Dex option]

With these, you can have a ranger who is less MAD, who has the Wis needed for spellcasting and who has the theme of using the wisdom derived from living close to nature.