One thing to keep in mind : It is not good to run the power supply at max load. It's a good rule of thumb to keep the power consumption between 50 - 70 % of the max load. So a power supply of 2A would be a strict minimum I think (it would be running @ ~80%). to maximise the space I would replace the Arturia PS which is 6hp by either a TipTop uZeus and you have 2hp free or 2 Behringer CP1A.

That said, I don't know your need in the -12v. The TipTop uZeus has a good +12v supply in 4hp but the -12v is kind of poor.
if needed more -12v 2 Behringer CP1A would do the trick and you still keep 4hp free

Can you split your rack into 2 seperate rows and give the links so we can have a more detaled consumption per row ?