As you probably know, many Dragon Ball Z Kakarot quests are only available during a few stages of the main quest. For this sub-story, wait until you've had a tutorial on super evil enemies after the battles against Nappa and Vegeta, then teleport to the world map and go straight to the quest that will give you the soul emblems of 3 characters at once.
The Pilaf Gang's Plan
If you don't have any experience as a farmer, you should be level 14 against level 16 RR robots. You are likely to take some good damage, check your skills and communities before you start the fight. These 3 robots are not fundamentally complicated to undo, you just have to do the usual technique: as soon as you see red footprints, move away from them and let the storm pass by to replicate more beautifully. In addition to the quest rewards, you'll get Pilaf, Mai and Shu's soul emblems.