>>535542732
get explorer boos (S) and knight boos (A)
send them on the 4th missions of the bottom level locations, craft whatever that gets you (pretty sure the resources there are higher but rotate) and sell that
later pick up shark (S) and rocket (S) boos to send to the other levels locations
don't always do the 4th mission though, you'll want to do of the 1st 3 to grab resources you don't have, to craft what you don't have, to turn it in at yam cha every 2 weeks. don't bother looking at what costs what, just click on the resource in the UI menu to see if you have any of it
the reason knight boos are best is they have a bonus at any stage