I count 35 AA (or more advanced) players ranked 50 or higher by Fangraphs on playoff teams or teams even close to playoffs (no teams in the Twins division included).
The Mets have an amazing 6 of those,, three of which are SP. That's your target, IMO.
Most teams have 1-3 at most. It will be VERY hard to get multiple highly rated prospects from most teams because of that.....IF you want players that will be in MN in 26 or 27.