Although I am not yet retired, I would tend to do the following:
- Build up a cash position to have a cushion in the event of downward fluctuations
- For subsequent purchases, focus on distributing equity ETFs, as taxation is lower there ~18.5 vs. 26.375

I would probably choose a cash cushion of around 12*30% of your planned monthly distributions. This would allow you to compensate for a 30% drop in dividends for a year. The cushion doesn't have to be there from the start, but could also be built up slowly.
2Settimana
@Eggplant
Thank you for your thoughts. My savings plan amount is currently 1600 euros per month. The rest goes into the cushion, as well as fixed-term deposits and crowdfunding investments that have returned this year. The idea of different taxation is interesting. So far, I've been dazzled by the apparently higher dividends from shares.
@Lawikhan Ultimately, it's the total return that counts, so I wouldn't just base it on the tax rate. But I would definitely include it in the consideration. Note that, in my opinion, swap-based ETFs are also taxed at 26.375%.

Another point that may be of interest to you could be the following: your (share) inheritance will be taxable in America if you have a certain value of American shares. The exemption amount is quite low and heirs only have 2 months to file an alternative calculation. This does not apply to European-domiciled equity ETFs, as you hold the ETF and not the individual shares.

There are now also providers who offer savings plans, but I think the costs there are relatively high. In my opinion, this also makes the most sense if you only have a handful of stocks with a high overall value.
2Settimana
@Eggplant
Inheritance is a point that I should still work on. I was not aware of this aspect. Thank you for that.