There's no question that with 164A of inverter maximum output current, your combiner panel busbar would need to be rated at least 205A, so you need to upsize your combiner panel. Unless there's a PCS system you can install that will monitor the relevant currents and disconnect an inverter if necessary to keep the total inverter current at most 160A. Which disconnection would never actually be required, given the PV geometry you've described.
Then there's the 4/0 Al feeder, which has a 75C ampacity of only 180A. For normal conditions you'd have to limit the maximum inverter output current on that feeder to 144A. Which again could be done via a hypothetical PCS that could disconnect inverters as required. Otherwise, you'd have to upsize the feeder to have an ampacity of 205A. If replacing the 4/0 Al is to be avoided, there are still a couple options:
Electrofelon mentioned using the 90C ampacity of the 4/0 Al, which is 205A. To do that on the grid end, you'd replace your 200A breaker with a 225A breaker, use a short section (4' is typical) of 75C 205A rated conductors to go to a splice box, and use a 90C splicing method to splice to the 4/0 Al. On the combiner end, I'm not sure if MLO lugs are already 90C rated? If so, nothing would be required. If not, you'd again use a splice box and a short section of 75C 205A conductors.
There's also the 100% rated breaker option. As I understand it, a 200A 100% rated breaker would need to be in its own enclosure. So you'd still have the 225A breaker supplying a short section of 75C 205A rated conductors to the 100% rated breaker, at the grid end of the 4/0 Al feeder.
Cheers, Wayne
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