Passive Income from stock dividends - Part 2

Dividends harvesting season is here. This year, and probably the next 2 years will be the right condition (deep recession probably happening once in 2-3 decades) to judge the success of the Strategy of Passive Income from stock dividends to fund living expenses after retirement.

So far, ROC from the following dividend play stocks

1) Kep Corp 7.4% (H2 - semi)
2) CIT 2.2% (Q4 - quarterly)
3) DBS 2.2% (Q4 - quarterly)

The question is for retirement passive income, which way? Through rental or dividend? So far, I couldn't get nett rental yield from private property. Tell me if you know.