The way I'd try to do it is.
BM a RFA we get a 1st and a 3rd.
take the lower of our firsts and trade back if possible for their first and another either 2nd or third rounder.
That could net us two later firsts, 19 or higher
possibly two 2nds ours and a later rounder like in the 50s.
one third rounder so we could have 5 picks in the top75 players
and if the team is a poor record team we (earlier than 18) we have that pick and a third for our 10/11
which means their first at say 14
our second at about 43
their second at about 47
our third at about 75 or so.
any way you see it we have dibbs on 4 or 5 of the top 80 players.