Inserted 3 frames delay just before save platform because I could. Well, mostly because it helps to have a standard spot relative to frame rule to trigger the boss fight from. Note the save platform route allowed me these 3 frames delay, saving 4 normal frames to get there, but 3 lag frames is the exchange.
Ideally, we find another frame somewhere, so we can take the sneaky route to avoid lag. But at least we have our frame rule here. Without the save platform route, we're looking at 7/8 dialog frame rule delay.