Well, you should be able to get away with putting a PAS cooler where the stock one is, in front of the rad. A small Mocal cooler should do the trick. I've yet to see a Supra driven on track that HASN'T overflowed the PAS reservoir due to overheating, so definitely a good move that. But that leaves the nearside for an oil / ATF cooler.
I don't have an auto, so can't comment on how much that overheats, but my oil temps were very high my last track session before I fitted a cooler - so much so that I had to come in earlier than I would otherwise and let it cool. It also heats up your engine coolant trying to shed the extra heat. So I'd get an oil cooler if you are going to be doing more track days - I have a smallish Mocal cooler. Dunno about ATF as I said, I think I'd do both. It gets expensive in plumbing and fittings, that's the only thing.