The listed versions in the Fate/Grand Order GRAND BATTLE mashup are the anime, original game, and 5th Anniversary arrangements.
The source description says the creator had already made a mashup of the anime and game versions, then found the 5th Anniversary version. The title identifies all three versions as the mashup’s subject.
Free Fate/Grand Order Codes
Current active codes and how to redeem them.
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Player Comments
51 players commented on this guide.
Good guide for Fate/Grand Order players. The strategy part was useful.
This guide answered the exact question I had.
Can you add more details about strategy in a future update?
The explanation is clear, especially for beginners.