Parenting bones to bones?

Is is possible to have a bone parented to a bone? or should i have it so its armature partented to armature?

Sure. You can parent a bone to a bone. In fact, that’s the default if you extrude a new bone from an existing one. You can also easily change parents and say if the child bone is connect (root to tip) to the parent bone or if it can be separated from it.