It would be good incentives to create specific exotic items for each planet/moon. With goals such as; Getting a certain amount of resources Killing a certain type of enemy (x) number of times Finding the planet specific elite boss and defeating it . I was thinking that Titan should have an exotic quest to re create Alak-Hul, the Darkening Blade’s great axe. The axe could have a unique ability that when guarding for a short time, the Guardian would become invisible and move faster while invisible. . For Nessus, a linear fusion rifle from a Hobgoblin that on precision kills would create a Fanatic detonation and also create a radiolarion fluid pool under the dead target. . IO could give you a Taken grenade launcher. The ammo used would be those homing void orbs that seek targets aggressively. . While on Earth, the specific exotic weapon could be the Colossus plasma railgun. One of the unique abilities with the weapon is you take less damage if you are standing still while using it. .