The staking plan is as follow:

3 unit bets: small bets, often bets with high odds.

5 unit bets: Medium bet, most of the bets will be 5 units.

7 unit bets: Big bets, very good value

10 unit bets: Very big bets. Those bets reflect great value. Expect this stake 0-2 times a week

20 unit bets: Huge bets.  Extremely good value on this bets, as they are 4 times normal stakes. You will see this kind of stake very rarely maybe 5-6 times during average year.