Not sure how accurate it is, but Ocean have published and ranked Irish Pension providers.
ocean.ie
Zurich, Merrion and Aberdeen (according to the Ocean data) are consistently the best performing.
While, Aviva, New Ireland and Irish Life seem to be consistently under performing.

Best Irish Pensions Fund Manager? Well, Go Compare...
Managed pension funds increase in 2021. But which fund managers are providing the best returns over different time periods? Interactive graph over 20 years
Zurich, Merrion and Aberdeen (according to the Ocean data) are consistently the best performing.
While, Aviva, New Ireland and Irish Life seem to be consistently under performing.