15 numbers, 5 deletions, 20 bets

 We select 15 numbers from 70 and 5 numbers from 25 additional numbers. The selected 15 numbers from 1 to 70 are substituted in place of the numbers in the system from 1 to 15, while the selected 5 numbers from 1 to 25 are substituted in place of the numbers in the system from 1 to 5 
Guarantee of 2 when hitting 2 numbers from selected 15 (guarantee applies to selected numbers from 1 to 70 and substituted in place of numbers in the system from 1 to 15)

5 z 15 1 z 5
1 2 3 6 7 1
1 4 5 6 9 1
2 3 4 7 8 1
2 9 12 13 14 2
3 4 7 9 12 3
1 8 11 12 13 2
2 3 6 8 11 3
2 3 6 12 13 4
2 3 5 7 8 1
2 10 12 13 15 2
3 5 7 10 12 3
3 5 7 13 15 4
1 10 11 14 15 2
4 5 6 10 11 3
4 5 6 14 15 4
3 4 7 13 14 4
8 9 12 13 14 5
8 10 12 13 15 5
7 8 11 12 13 5
9 10 11 14 15 5

The numbers from 1 to 15 should be substituted for your own selected 15 numbers from the range of 1 to 70 and the numbers from 1 to 5 should be substituted for your own selected 5 numbers from the range of 1 to 25