Never understood "Risk adjusted". Isn't that why you implement a risk management strategy?
Mine is simply to not hold losers in the portfolio.
As for taxes, that is true. Up here in the frozen north we have tax free savings plans that can be used for trading although the government frowns upon making obscene amounts day trading. Still I have to pay quarterly, one of the downsides of making money.
My objective is to preserve my capital while funding my lifestyle. As long as I have a greater liguid networth at the end of the year than I did at the start, I'm relatively happy. I no longer have liabilities. (no debt)
There are years when I do not outperform the S&P. Those are the years that it makes huge gains. But the years it crashes I end up in cash. It works for me!