Strategies are just the calculated outcome, but we don't know how far the expectation gets fulfilled. It needs luck. In such situation I'll go with the minimum bet value for the maximum outcome, because I've experienced massive losses going for roll above 2 and the dice rolls within 2. Gambling is all about luck and strategies are just a way to keep ourselves positive on the outcome. The strategy that worked for our friend won't be successful for us, which is the reality we need to understand.
There is no way to calculate an outcome in gambling but many are still trying. I guess it can give them a sense of confidence and they think it's better to play this way than just playing the game randomly. Sometimes the expectations can be fulfilled earlier if we are lucky but it can also be fulfilled at a much longer time. We can't end up in more losses if we won't stop or if we will continue to deposit more.
Your strategy is also my strategy as I think it's less risky but avoid those high win chance games as my experience isn't always pleasant on them. I think they are only an illusion for the players to hope and lose more money.