Netsuite Item to Shopify Product Script Execution Time Exceeded

Hi, I'm trying to set what my page size/batch size should be for a fairly large set of products within a Netsuite Item to Shopify Product.

For example, I am consistently getting a Script Execution Time Exceeded error when the import is fairly large, say 40,000 items.

1. What would a realistic Batch Size Limit and Page Size limit be to accomodate this number of item updates?