My first TAS attempt in years.
giving a shot at updating the current Holy Diver TAS.
I improved the first stage through better jumping and shot placement.
Stage 1: Mine (old) = Gain
First room: 660 (660) = 0 frames
Second room: 1946 (1949) = 3 frames
Third room: 2887 (2895) = 8 frames
fourth room: 3391 (3402) = 11 frames
Boss fight: 4514 (4546) = 32 frames
Most of the saved time in the boss fight was positioning. I would head back towards the entrance for a better shot when I could without wasting any distance to make him back up to the exit at the end of the fight.
Also saved time at the end by switching back and force between twin shot and single. Twin shot will not fire when there are more than 1 shot on screen, while single shot will fire with 2.
Any input / suggestions / questions are always welcome.