He'd be a decent upgrade over Bertans if we could get him for a swap + 2nd rounder.
2021 stats:
Porzingis: 20.1 points, 8.9 rebounds, 1.6 assists, 47.6% FG, 37.6% 3PT
Bertans: 11.5 / 2.9 / 0.9 / 40.4% / 39.5%
So that gives you a starting five in 2022 of Westbrook, Beal, Porzingis, Rui, Bryant with Deni, Gafford, and everyone else off the bench.
Not much of an improvement, but that's arguably a better starting squad than 2020-21. Porzingis would need to stay healthy and be comfortable being the third or fourth option in the offense.
If you want a true Ernie move that would even have made Wes Unseld proud: This floats the idea of sending Bertans, Hutchison, Bryant, and five draft picks to Dallas.
https://www.nbaanalysis.net/2021/06/07/heres-how-the-wizards-could-trade-for-mavericks-kristaps-porzingis/2/