Hi,
I think you should not have many problems vs this illegal formation : 1 DC only and 1 MC only?

I'd try 4-1-2-3, target on the center,mixed pass normal or offensive strategy , it depends on how strong his attack is in the beginning of the match,
Consider that he can't be defensive, and his strategy is so expensive that his players will soon get tired.

Normal mode and counterattack on at start,to prevent his attack to find space and try expoliting counterattack.
Later during the match,or soon if required,you can switch offensive and counterattack off, offside trap should be anyway avoided with so many offensive opponents