Rugby: Ian looks to raise Rankin of clubs XV
Some seven members of the squad have been involved in the inaugural competition either for Heriot's or Ayr.
Rankin said: "There is no doubt the B&I Cup has been a success and helped take players up to a higher level.
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Hide Ad"Hopefully they won't find it such a big step up going into international club action."
Late changes see Heriot's hooker Finlay Gillies step up for club-mate Scott Burnett while Currie's Alastair Hamilton starts at prop in place of virus-stricken Alan Brown.
Rankin says it is a big occasion for Hamilton in particular.
"Alastair has come through despite missing out on any age-group recognition, which provides added value to the clubs' international team.
"He has a lot of potential and, building on his 40 minutes off the bench when we beat French clubs this year, this is a chance for him to show what he can do."
Meanwhile Rankin has warned his side to beware a backlash from an Irish team beaten, albeit narrowly, by the English clubs last time out.