The Rays are very good at identifying and acquiring ML and miL talent on other teams, while timing almost perfectly when the players they trade away are at their exact point of the start of decline.
I might argue this is their strongest suit.
Their record of acquiring players that go on to have career years, sometimes just for 1-2 years is astounding. (Some are then traded or non tendered in 1-3 years.)
Their record of dealing away apparently good players right before a serious decline in uncanny.
Yes, they have drafted and developed pretty well, but I put ATL, BAL and LAD above them in that area- maybe tehre are even more teams, but I am no expert on even our farm, let alone other teams.