At the minute, playing 2nl 6m, I just open tables and see what the stack sizes look like, trying to find a seat with 2 weird stacks on my right, like $1.65 or something, this to me means either:
a) They're just not buying in for 100bb
b) They usually buy in for 40-50bb and they have chipped up a bit
Which is the players we want on our right.
When I was playing 12+ tables of FR I just used easy seat, with filters set up like the ones you used, and left after an orbit if the stats weren't looking good. Which maybe isnt the best strategy, but its the easiest when playing a lot of tables.
When playing FR though I dont see any real difference between the limits up to 16nl tbh, I remember first moving up to 10nl and thinking it was nails and all the 50nl regs opinions were out of date, but theyre not, obv you have the filters there but look at those lobbies for say 5 mins and there'll be plenty of tables that come in imo