I am an American with a bank account in Norway, having had an international assignment there and leaving the account open. Every year, I have to fill out a FBAR for the IRS and pay taxes on interest, but other than that it is nicely 'hands off'. Not sure what the rules are in Ireland.
Currency exchange is also a nice hedge from domestic asset allocation, so I like the idea that, especially if interest rates rise in the US and stay the same in Norway, the currency exchange should grow more favorable. Norway is a very stable country, but they currently have pretty high inflation. I also like the fact that their banks charge very reasonable fees (good exchange rates and low transaction cost, this is important to be aware of).
My basic strategy is, when nok/USD is above 6, I spend cash using my US ATM card, and when nok drops below 6 I consider taking money out of my Norwegian bank using the ATM, it's as simple as that. It's a very slow spend, somewhat in line with the decline in my outstanding mortgage balance for the most part, but I like that it offsets my exposure to the USD, since I plan to travel extensively in retirement. Any time I want, I could do a wire transfer for larger sums, but I get a call from my bank for amounts over 10k.
Even with this mostly pleasant experience (my ATM card got shut down once, but I have regular business travel to Norway, so it wasn't a big deal), I'd be uncomfortable chasing high yield in any of the countries you mentioned. Would you really want to have to fly to these countries when there are problems?