The Browns didn't tank, for the record. They are constantly brought up as a reference point for what we are going through only because they similarly had a lot of draft capital over a short period of time. That's lazy analysis.
There is no comparison for the blue print between both franchises.
The Browns passed on Goff, Wentz, Watson and Mahomes. They weren't tanking, they were circling the toilet bowl for years already.
The Browns amassed their picks by passing on QB's, waiting for the right one and subsequently passed on 4 guys that would've been "the right one" for a Faker.
The Dolphins obviously amassed their picks by trading the players they already had and in both cases appeared to have scored better than expected value.
Do everything the opposite of the Cleveland Browns. Don't pass on the QB, don't use all your picks up in a short period of time without securing future assets. Don't trade for veteran WR's and pay them big money.