When using this with a team like Brighton, would you change the mentality to cautious for away games?

Tactic is brilliant, currently using it with arsenal in my 5th season. Only issue I notice is that away from home, especially against the gods teams like city, Liverpool etc I seem to struggle. Is it best to start of with solid blue and then change accordingly. Also when should I use solid blue or light blue?

When testing do you put players into positions and tick "use current team selection when possible"?