Hey lad , yes you should use the 3-5-2 in away games and in particularly hard fixtures use balanced mentality and diamond for home.
As far as the question what vujevic is using , as far as I am aware vujevic is also using the 3-5-2 and 4-4-2 diamond.
You can see how he plays btw on his twitch channel replays.
See the broadcasts here where he plays his save
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