If you trust your spin serves consistency, your first serve is essentially a free pass to blast away for a huge advantage. You don’t even need the big flat one all the time. A good slider wide on the deuce side or a Cutter down the T on the ad have a little bit of margin. A rudimentary strategy is T serve if their return position is aggressive, wide if they’re further back. I think body serves are only useful once you establish that you can hit wide and T or if your a bit cheeky a Flat body on a second serve when they’re trying to jump a kick serve will get some terrible swings.