Tier 3 is 30 minutes. Problem is, the line does get updated not as often. Waiting 5 minutes to see it drop below the middle is not fun. Oh, and the speed up is not a speed up. It just removes the cooldown for that 10 minutes.
That is not hard. 5/5 in offline income. 1/5 in the prerequisite. The mega button sucks. The rest, 1 point each in clicking and then rather evenly on the two clicking skills with an emphasis on clicking power. There is a x2 to x4 increase somewhere. That is more gain than from x2 to x3.
If you log in with longer pauses in between, the stock trade is for you. Diamond stock trade is not worth it.
Compound interest means, that you would eventually get more income by stock trading, than with offline time or private shows.
And I have a feeling, if you do not start the private show, it lingers for longer.
And as I previously speculated, best company lvl strategy so far: Hire 10 cheapest girls plus hire the most expensive Girl. This way you get the most Lvls. You have more income with more of the Top5, but not enough to compensate the lvls.
Example from my last company upgrade:
That are the lvls I could afford when leveling all girls evenly. If I would not have hired Charlotte, but Anika instead, I would have needed almost 100 lvl more for the company sell goal. Of course, I could have almost doubled my income, but insane number growth does not work this way. To get +5 lvl on every girl to have 55 more levels you need more than double money.
Amber 545 20 Sara 520 220 Chloe 495 3k Lisa 465 29k Dominique 460 80k Alexis 440 350k Ms. Rider 415 5M Charlotte 410 12M Ayumi 385 102M Judy 325 36T Delilah 300 26T Anika 300 22T Laura 300 18T Cassandra 300 14T