There are black lines separating each "split". The run is overall split into 4 parts (separated by pink lines) in which breaks should be taken between each part. Each collection of multiple pinatas next to each other in the route should be done around the same time. When I say R (as in "Cluckles R" for examples), I mean to just Romance the Pinatas. When I say MR (as in "MR Raisant"), it means to get up to seven of the pinatas without romancing them using the duplication glitch. Sometimes it's not convenient to Master Romance a pinata while Romancing it, but for the most part you will. During the last split there is a line featuring all the stuff to have in the garden to make all the Arctic pinatas residents. All the stuff in orange should be tinkered. Each color in the background of a variant/requirement represents a different thing:
White/Blank: Something that should be in the garden already (A Bluebell and Water Lily should always be in the Garden because of how much they're used)
Cornflower Blue: Seeds. Seeds plant themselves fast so they should be bought right before they're used. Light Blue: Fruit, Vegetables, Produce, Garden Items. Can be bought and will last for a while.
Orange: Tinker Items. Take a bit more time than usual so should take priority.
Light Green: Plants. Usually take a while so should take top priority.
Yellow: Weeds. These will require supervision so you don't get pinatas sick by accident.
Red: Mushrooms. These are the most difficult items to obtain and I recommend going into another garden to make all the mushrooms and crating them.
Pink: Pinata you might not have. You probably won't have 2 candaries when going for the Kittyfloss for example, so you need to get them ahead of time.
Magenta: Pinata decorations. This is to help remember what pinatas need to wear for their romance requirements.
There are also color codings for the tree fertilizations but those are pretty self explanatory. As for the "Extra Awards" and "Passive Income Residents", these are awards/residents you can get while you wait for other things to happen. As a general rule, the less time you spend waiting the better. If you have to wait for a pinata to visit/reside, you should spend your time doing other awards, and eventually said pinata will become a resident. The top of "Extra Awards" are variants that can't really happen during the rest of the run because the variants aren't unlocked yet.