Throughput multiplies the wrong engine
Digital text PDFs batch as objects when the layer exists. Picture pages batch as OCR if you bought that. Spot-check the first .pptx. Two hundred pages is two hundred slides — split first if that is not the talk.
Why Pro
LibreOffice/VPS, not a dying laptop fan. Labeled before you start.
Sort the pile
Digital versus scan. Then queue. Name files so slide 1 of “finalfinal” is findable.