Ok so i got an important cup match tomorrow and i could really use some tips on how to beat this weird formation..

He's playing like this:

------- ST -------
------ AMC ------
ML - MC -MC -----
DML --------------
---- DC DC DC DR -


I was thinking about going with 3-5-2 v (i need to go offensive, he won 2-0 at my home ground earlier so i need goals), and maybe with attacking left flank? Seeing as his right side in def isn't protected very well.

Any other suggestions/tips?