9/10 are great for the speedrunning, but 6/7/8 are better at getting the all the supports themselves completed but it doesn't matter with 6 because no support log but I digress. 9 is quite the stingy game when it comes to max unit size per chapter, requiring leaving a pair of units out of the action when another pair needs to catch up. Glad there's Chapter 26 and its massive 19 unit capacity to catch everyone up.
Completed that particular run last night, logged in 25 hours iirc, and that's with me wasting time on Chapter 17 getting units promoted. Got about 6-7 supports rammed up to A, bringing the completed percentage up to 75%.
More notably, I don't have to use Oscar, Tanith, Lethe, Reyson, Lucia, or Kieran ever again for the purpose of supports; adding them to Mia, Geoffrey, Stefan, Volke, and Soren, that's a good 30% of the cast wrapped up. And if I can get the supports I want in this run, I can add Ranulf, Marcia, Nephenee, Calill, Bastian, Titania, Boyd, and Rhys onto that list. That's about 50% of the cast there, which should speed up future playthroughs significantly, as I'd only have Mist and Rolf being the remaining starting Greil Mercenaries to work with, letting me blast through the first half of the game with a souped up Ike and one other unit. Hopefully.