Heretic of The Seventh Circle
A decent AHC doesn’t need any more unique spells than the ranger has, IMO.one thing doesn't exclude the others.
You can give wizards and clerics a lot of spells AND throw other spellcasters more spells.
You'd have to in order to make a decent AHC.
Which is wholly unrelated to the other issue, of who comes up with the spells in-world.
I mean, who says an Arcane Trickster didn’t invent Shadowblade?