If we get Oscar this year then next year's mercato will be an absolute breeze. Everything but a Fullback is taken care of. Adding Oscar to the team we will still manage to have a younger team NEXT year than we did last season so we won't be needing a major re-haul of the lineup. Replacing Evra next summer or Licht depending on various factors of course.
From a long term objective it might make more sense to splash the cash (spread over a couple years of course

) to get Oscar and we have 85% of a lineup that won't change over the course of the next 4-5 season.
Next season: replacement for Buffon, Evra and maybe Licht if his performance continues to slide.