You never have to bonfire so you can just keep going and going. You aren’t sitting around for mana, you aren’t sitting around for hp and if you happen to have a nice density you can clear them fine with your innate AoE Ratio.
By the time the mob HP increases too much parties are licking their fingers to get you into the group so they can actually start the farm. Most DD classes cannot effectively do downtown/truffle grind etc.
Linker/Chronos I didn’t play yet so I cannot comment on that, but I am pretty sure most people aren’t talking about chrono/linker when they say FS