What Ni comes up with can be unconscious/out of control, but that's only a specific aspect of Ni. More fundamental, I think, it the shifting of perspective. Also, like your description of Ti, it's holistic (I think this may be a feature of introverted functions generally). Ni...coalesces concepts into conceptual theoretical wholes, it integrates. And because it can alter its own perspective on things, it can coalesce things in multiple ways, and it can combine the seemingly contradictory by conceiving of the components in such a way that they are no longer contradictory.