Try and use Echo bonuses. Echo bonuses are when you obtain the same quota multiple times in a row. Based on the number of the same quota in a row and the number of coins used will determine how many bonus quota points you’ll receive. Getting bonuses on your 10th time in a row will yeild more bonus points than your 3rd. You’ll get more points if you use 4 coins per turn than if you used 2.
If you want to play conservatively, always only use two coins, a starter one and a border one. Keep using only two coins over and over again and your echo multiplier will increase giving you more points the more you go on. On your first turn, you’ll get 1 pt., your second you’ll get 2, your third you’ll get 3, etc. If you want to hurry this up, try using three of four coins per turn instead of two.
Also, try to get rid of the higher numbers first because a 9 will be cleared off the board no matter if you use it or not. So if you need a multiple of 7, use 5 and 9 as apposed to 5, 3, and 4. Although the second method would net you 2 pts., you’ll lose 3 coins when you could lose only 1.