What would you suggest?

I still like Berkshire, QQQE, and RSP.
If I were building a no-investment-decision retirement fund today for a non-expert, that's what I'd put in it.
Is RSP apparently overvalued? It sure seems that way to me. But in the long run, does it matter THAT much, if it's only one leg of a tripod?
Especially with the assumption that the investor in question has no particular investment expertise.
Things are hard to value, so it sure simplifies things if you don't try! Spend the effort on picking the right things.

All three will be worth more in real terms after five years, and more again in ten years, and yet more in fifteen years.
As a group I think they could support a 4% SWR starting from here, even though I'm not sure RSP by itself could manage it reliably starting from today's prices.
(each quarter withdraw 1% of starting portfolio size, adjusted for inflation. Sell small equal percentages of all holdings because dividends won't be enough)
There are certainly better withdrawal plans, but that's the one most people use to start the discussion.

My gut feel is that QQQE will rise in value the fastest among those three, because of my perennial assumption that Berkshire's growth rate will soon start to slow visibly on trend.
Hasn't yet, but it seems inevitable.

Jim