Train base resource prioritization

Hi, i’m looking to build a more train centric base, however i’m not too sure how to prioritize where the resources go on each train.

Would i just have each drop off and pick up for each resource named the same thing and then have N-1 trains where N is the number of stations with a station limit of 1, or would i have to do some circuit shenanigans in order to ensure that each drop off station gets the correct number of resources delivered. Thanks in advance lol