without grapple swing
These are rooms that can be passed without grapple swing. Currently you can get up to Elysia before having to get it (the ziplines quickly make it needed).
Late grapple swing is not a clear time saver; outside of 100% it's still in debate. It saves time in 100% because you can get the Reliquary III missile expansion the first time through Grand Court, as you have the ice missile already.