Munster and Leinster have been boosted by the arrival of southern hemisphere players CJ Stander and Michael Bent over the last week.
Bent is Irish-qualified through his grandmother and was immediately drafted into the Ireland squad and is training at Carton House this week.
The 26-year-old has played most of his rugby with New Zealand provincial side but has also featured in the Super 15 for the Hurricanes. Though capable of playing on either side of the scrum, his ability to play in the crucial tighthead position is of most interest to Ireland.
The Irish scrum was dismantled in Twickenham in Ireland’s last international in Europe after first choice tighthead Mike Ross departed due to injury early in the match.
Back-row forward Stander will arrive in Munster later on. His Blue Bulls team were knocked out of the Currie Cup by the Natal Sharks 10 days ago.
The 22-year-old was a second-half substitute in that clash, but scored five tries over the course of the season and was seen as a key player in a highly competitive back-row.
Stander is not currently Irish qualified but could potentially follow in the footsteps of his fellow South African Richardt Strauss and become eligible to play for Ireland through residency after the three years.
Leinster hooker Strauss was included in the Ireland squad selected by Declan Kidney last week.