The geometry of the skids/nose touching the slope is such that the blade tips will not impact on the upslope as long as it is the same slope angle or less. A competent and capable pilot should have no problem judging the slope and thus carrying out the evolution.
crab@, the narrow skid set on the 117/145 is such that a side-on skid landing is less safe as the slope angle has to be less to ensure tip clearance, plus there is no other fuselage point to give an assurance in the same manner as the skid tips/nose touching as shown in the videos.