so, from what i figured: passion bar can reach beyond 100% to buffer up.
third mood upgrade from the shop isn't worth it, most of the time you don't spend more than 10 mood in a day anyway.
the sex minigame with her, the faster you click/finish the game, the greater the points.
to get the god behind her back bonus (double completion rate) as often as possible, you need to:
1: bring variety in her work aka not 3 movies in a row. alternate between 3 jobs increases the chances of getting it exponentially. if not job, date, stream, school, etc.
2: fill the passion bar up. even at 90% full, it has a good amount of % to fail you because screw you reasons.
3: speaking of screw you reasons. give your girl the D once in a while, help with the % of chances to get god behind her.
4: save cumming also works. do it like 50-ish times and the game crashes because memory leak i presume.
finally, i got a stupid level of talent girl to win oscars, music award and rap battle while paying my debt, without using streaming, sexy bus or any of the characters who boost your stats for money (except eve, and politic guy. if you don't know who eve is, then... well, figuve it out by yaself

)
but i only got 3 courses of his couple class.
as a side note, the costumes are worth about 60+% of your debt. do you really need them that much?
i wonder if skill increases the overall point earned for each other stats... might explain why getting all those high marks was so hard but heh, got her in the end.
now, unto making her the sluttiest streaming politician.