Inverter for 4 strings

Happy Easter Ladies and Gents.

I now have an 8.62kWp system consisting of 4 strings split between a 5kW hybrid and a 3.6kW string inverter, but I already have in mind to get a bigger inverter and NC7. I am thinking I would prefer a Solis 8kW or 10kW single phase hybrid.

String 1 is 4 x 435W Jinko Neo with optimisers. North facing main roof. Hybrid inverter.

String 2 is 8 x 435W Jinko Neo. South facing main roof. Hybrid inverter.

String 3 is 4 x 450W JA Solar. South facing flat extension roof angled about 20 degrees. String inverter.

String 4 is 4 x 450W JA Solar. North facing flat shed roof angled about 10 degrees. String inverter.

The North panels on the main roof are the only ones with optimisers.

Here's what my (possibly imaginary) problem is. I would prefer a Solis Hybrid 8kW or 10kW inverter, because I am familiar with the 5kW hybrid already. Looking at the PV inputs, it takes 4 pairs of them. However, it seems to only take them in 2 pairs of 2 to accommodate split larger arrays, rather than 4 truly separate strings like my setup.

See image here

Can I connect the 4 strings into any of the 4 input pairs above?

So, lets say main roof panels populate the inputs in the PV1 box and the extension and shed strings populate the PV2 box?

I am thinking no, because while the house panels might be OK due to the optimisers on the North facing panels, there would be an issue with the extension and shed strings being put into PV2, because they are at opposing directions and inclinations and neither string has optimisers.

If I am correct in my thinking, would adding optimisers to either the extension or the shed string allow me to put them into the PV2 box?

Maybe I am totally wrong and it's perfectly fine to add the 4 strings as they are without optimisers?

Thanks for looking.