You will need -> 2 x 81
-> 3 x 84
-> 6 x 83
Considering most of the 81 rated ifs are going for discard, this would be a more affordable way of doing.
In other ways, you will still be needing 2x84 rated players, in this case you need 3, however, at the same time, 83 rated players also is costly.
You can save 2 83 rated for 1 84 player.