What’s generally the most efficient inbound placement method when sending inventory?

Hey there, so I recently sent my first shipment ( 1 SKU) into Amazon FBA as a relatively new PL brand owner. When I had the option of selecting 1) 5 shipments (for no placement fee) 2) partial shipment and 3) 1 shipment (with the highest placement fee), I went with option 3 because I felt this would ideally cut the time from shipping from my 3PL to having inventory ready to sell on Amazon.

Is this a correct way of thinking about this? What criteria would you look at to consider the shipment method?

Hope this all makes sense, and I appreciate any help!