I have less than 1% in cash.
I have my brokerage money (which started out 15 years ago as my emergency fund money) in several tax managed CEFs which throw off monthly income from qualified dividends, long term capital gains, and some return of capital (from the option income CEFs which use ROC by design). At some point I will add in interest income from municipal bond CEFs and more ROC from individual MLPs. Maybe add back in some individual stocks at some point and some non-tax advantaged assets as well (equity/mortgage REITs, BDCs, taxable debt, etc).
With equity CEFs I am basically targeting three categories: (1) your typical equity CEF that pays out every cent it can each year and uses leverage (2) equity CEFs that put a substantial percentage into qualified preferred as wells as common stock, use leverage and purposely hold back some UNII so that distributions grow each year and much less likely to decline in a down turn, and lastly (3) CEFs dedicated to option income strategies and use no leverage (call option percentages range from 45% to 95% among diff CEFs, one also uses a collar strategy to be even more cautious).
Yearly income from equity CEFs is currently around 89% of my living expenses and taxed at 15% or less.