Loss recovery

I've a bot strategy and I want to improve it with loss recovery. My strategy is Lay the Draw when the odds of both team are above 2 and, after a goal, I green-up. So, I just lose when a 0-0 happens.
But, when I 0-0 happens I wanna recover the losses. What best staking plan for this strategy?

PS: I do many matches at the same time.

Do you lay the draw pre-start, in-play or both?

Pre-start

Could you not back the 0-0 score as an insurance bet?

Because I'll reduce my profits (I close the bet after a goal) and I think that doesn't worth.