Don't even attempt to 'counter formation' if the opponent is weaker than you, go 'hard attacking' 'hard pressing' and 'hard tackling', play 3-4-3 or 3-4-1-2 and let him worry about your formation, not the other way round!!

The counter, if there even is such a thing, is only for when you are wary of the opponent and wanting to avoid defeat.

I'm roughly the same as you, average 70.3, and If I played someone average 53 I'd be expecting to win by at least 5 or 6 goals.