What you can do is to drop your sign and wait for a player to join.
Killing the boss will obviously give you a great number of souls, so fighting him multiple times is very helpful. The final boss of Dark Souls 3 might not be what comes to your mind when thinking of finding a soul farming location, but it’s a very interesting one if you think about co-op gameplay. This makes the entire grind loop very efficient. To make things even better, if you get behind him once he’s being summoned and stab him a few times with a heavy weapon, it dies quickly. The knight is infinitely summoned by the Man-Serpent Summoner in the area and you can kill the knight as many times as you like, which of course, increases how much you gain. But interestingly – that’s just the beginning. If you go to the Archdragon Peak, you can fight a unique Drakeblood Knight that drops 4000 souls once killed.
