Numerous good suggestions here. IMO and current thought is biscuits add very little strength and are used mostly for alignment. If you want to add strength, use pocket screws. Also, a good rip blade will give you a good sufficient glue edge without needing a joiner. I'd keep running the boards through the table saw, taking off a minimal amount, and dry fitting until there's minimal gaps, doing all boards. Mark the boards, then glue them up one at a time using a lot of clamps. Don't wipe off any glue that squeezes out. Let it dry, then scrape off with a sharp straight edge.