Sharpen the keeper's reactions: react to firm, driven serves and still take a clean, held catch at pace.
As the handling warm-up but the feeder now drives the ball firmly from twelve yards, low to each side and hard at the body. The keeper reacts, gets behind it, and holds it, no parries. Keep the tempo high with a quick return each time. Build toward it after the gentler handling serves so the keeper is fully warm.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.