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We propose to observe 6 SZ-selected galaxy clusters to complete the follow-up of a large representative sample of 45 objects at 0.5 < z < 0.9. All are targets of an ongoing 300h Guaranteed Time Programme of high-resolution openPar< 18 closePar SZ observations with NIKA2. The sample comma extracted from the Planck and ACT surveys comma covers an unprecedented mass range at these redshifts. Combining measurements of gas density from XMM-Newton imaging and pressure from NIKA2 SZ maps comma we will study individual radial thermodynamic and mass profiles comma their dispersion comma and the relations between YSZ comma YX and mass for the first time in this mass and redshift range.