Kazunoko (AKI) vs Otani (Luke) Street fighter 6 Play By Play Breakdown 

For the heavy kick into sinister slide blockstring on aki, luke can use ex dp or any super to beat any option once they go into sinister slide. Also ex dp might be a good option if you see aki using sinister slide in neutral because there is barely a gap between the activation of sinister slide and when aki can use one of the moves from it so using a normal to hit it might be unpredictable. Modern makes doing this easy.