Setting item drop (Grim Dawn)
There are mods or by editing the configs to change the chances of getting things. For example what would be more legendarok fell?Is there a trainer where you can increase the spawn of mobs, in theory this should increase the chance of drop.
DeMZI
There is actually not a pleasant one illegal maneuver. As you know in the last update added for the last two challenges of the new blacksmith that can exchange blood X'of Tone, a rotten brain, the Ancient heart of the legendary thing. Take this entire matter to the exchange, then do a backup of the savegame, and then a Chapa to him and exchanged it for legendary things. After all this throws need legendary stuff in the General section of the chest. Next, a backup of the save files take this character, who traded things and replace them the original. That's it - exchanged things preserved, and rare matter again with us, allowing you to repeat the procedure many times.
PS Remember - this is a nasty cheating, but I'm not a guardian angel to protect from such things. All at your discretion.