Just to give an idea of why I think there is a connection between Kant and the Ari I think it wise to show what Kant is thinking by these simple diagrams. And to mention some aspects of the Ari that reflect this system. The most obvious thing is the תשעה היכלין. The nine palaces. This is clearly here in which each power of the mind creates a representation in the order I have presented here.  [that is 1 to 1; 2 to 2; but reason leads to knowing  synthesis of representations-a kind of perception that does not come from sensibility. ]

. [This is a long subject in the Ari .]

At this point Kant does not stop, and nor does rabbainu the Ari. The mind has this further power of synthesis or Daat that acts on the representations that are given by the male aspect of the Mind.
Kant is going to make a difference upon what kind of representation the Daat {synthesis is going to work on.} This is what produces universals. The Ari himself does not put it in this way but it still is fascinating to see the connection between the Ari and Kant.

Synthesis/Daat is known to have two aspects דעת עליון and דעת תחתון. There is a essay by Reb Chaim Vital about this subject that formed the basis of the Reshash's interpretation of the Ari. But the interesting thing here is that Kant also sees two aspects of Daat. This forms the most fundamental idea in Kant; the Transcendental deduction. That is this synthesis perceives the self and also perceives  and combines universals. This forms the idea of Kant that we can trust synthesis because it gives us our own sense of identity.