Given the circumstances presented, I would be inclined to keep things really simple - leave, maybe, €15k on deposit and use the balance of the savings to buy 4 year savings bonds from An Post.
If you think your brother could handle some additional risk and complexity, he might consider using a portion of his savings to buy shares in an income focused investment trust like The City of London Investment Trust plc. It's long established, well diversified, reasonably cheap and currently yields ~4%.
I think your brother should avoid the sort of managed funds that are currently offered by Irish life companies. For starters they are pretty expensive but the tax treatment of these funds make them really unattractive for somebody with a low marginal income tax rate (which I suspect in your brother's case is zero).
Hope that helps.