general staking/system question

some staking advice please...if you ran a system that had regular wins, but occasional losing runs of up to 20, what would be the most effective staking plan...ie standard stake to win x amount plus losses; or is there another ingenious staking plan (not martingale)...or would it be best to take the hit after say 10-15 losers and restart...rough odds 4/1 to 6/1.. approx average 1 in 6 one in 7 hit rate..and no it isnt a sell/scam...just after the most effiecient staking plan to run the test over next 3 months.