the consistent way ive been managing is only training marketing the bare minimum since the events even before the first goal give plenty! once you know you're set to reach that goal in time, pick a merch type from the second goal and lock in on training its skill. it's best to make a ton of that one item when skill is as high as can be. spread love of SP always
if you like i can also just say the specific steps i did (i tried to keep it still somewhat vague)