All the examples I used were closed team game maps. Team game Arabia obviously has more early aggression and is therefore more versatile with strategies than turtle boom maps.
The difference is that the 1v1 Arabia Franks picker doesn’t have to go scouts into knights to win the game. Even with his limited tech tree he has quite a few options or directions he can go. Whereas on a closed team map, you simply must turtle and boom into your strongest army composition, and not doing so will almost definitely lose you the game. So there is less room for flexibility or different strategy. The main puzzle you are solving is how your team mates’ civs can synergize to create the best army comp to counter the enemy civs.