Maybe bet to collect would be the safest option.

With such a small sample it does not give us the bigger picture.

I feel a min sample of 150 results is a start.

With those results being in profit at level stakes , any staking plan will work.

Here's another staking plan.

1.0 , 1.50 ,2.0, ,2.5 ,3.0 ,3.5 ,4.0 ect
Go back 2 places after each win 4.40 & less.
Go back 3 places if 4.50+
e.g.
1.0 ,1.5 ,2.0 ,2.50 ,3.0 ,3.5 ,4.0 ,4.5w ,3.5w ,2.50 ,3.0w , 2.0w 1.0

Cheers.

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Cheers.