Let's find guidance from Fermentis and "do the math".
source: current Fermentis US-05 product information
Convert from hl (100 liters, hectoliters) to U.S. gallons:
Scale guidance to batch size
Fermentis recommends re-hydration with high gravity worts in a number of videos in the 2020 / 2021 time-frame.
Two or three packages of rehydrated US-05 looks like a good starting point.
With a wort that is close to the "alcohol tolerance" level for the specific strain, an extra package would be "cheap insurance".
My suggestion (go with 'cheap insurance'): three packages of re-hydrated US-05.
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