I would just say, Dark Fairy is probably the most "OP" to carry over when trained right. Especially use the Exchange skills, because you get 2-4 free action points (Faerie Secretions), training dust (Fairy Dust), and a rich customer ("Fortune Summoner" from Oni) simultaneously when you do it right. The Stamina penalty from "Tiny" can be offset with the Elf "Protection of Spirits" when working. And dumping a lot of Health/Mana EX potions to those low pools make it easy to train (and something you'd otherwise do to carry them over) . Sprite/Tiny can be a hard fetish to fill too for Clients. (Angel would be the second best because of "Anal Preference" and "Wetter" which are harder to find together and makes a lot of fetish matches) Either one can get "High Class" (1.5x) from Queen Naga or a really useful skill from Kraken (Melody of the Sea). 3rd is subjective but probably "Queen Naga", "Kraken", or "Ogre" (NG+). As long as you take the "Fortune Summoner" and "Melody of the Sea", I don't think it truly matters.
I beat the Expert mode with no achievements. I guess a few tips that helped me:
- You can set up the RNG a bit early to clear 30k+ the first day (drain two clients with/without extension RNG). Even just one proper drain is worth ~15k-20k. And the drains increase your club score (which increases how much you can train and girls you can access) Then you buy (ideally) Myconid or Cyclops (or whomever the clients want most)
- Make sure to use the Escort agency a lot. Week 1 is always the same. Harpy is easy (2x Gentle on Day 1 and Pop an egg out on Full Moon and you can escort her.) Werewolf I rest about this time, put them in heat with aphrodesiac, and then Face Fuck about 3 times and their good. Myconid just needs to be left alone for a day and then use 3-4 action points (including the spanking) . Dagon needs to be put into heat and can be hard. (though you have time) And Cyclops isn't *as easy* but high Stamina and "Maid Knowledge" gives bonus to escort earnings. And putting them into heat once or twice will do it. You can always just do Harpy/Myconid and then Refresh. Long term escorts are iffy for me though they free up space. This is because the payday is so far out...it may not be worth it to "snowball"
- You don't need a lot of the auction girls. (Arachne is a niche fetish as is Dark Fairy) Maybe if clients want them that day as, in the long run, they aren't that expensive. (only space might be limited) Others not so much especially if money is tight. . Additionally, no point to chase Mila. (though not a huge advantage not to either) You can still turn her down at the end if you are struggling and don't want to do the extra payouts.
- You need to micro manage (look at clients for each day) and match the girls you need. (Unless you have "Melody of the Sea", to reset I think it's easier to match the first 4 or so in order with the girls.) Bigger lists have RNG (based on TEC) so you don't know which girl will recover in time to match later clients. (unless they only match that client) Typically I would look at the Escort list for long term (7 days) who/what I need to train that week. And daily which girls to buy from the market to meet the customer needs. (you can refresh the market by exiting and re-entering so you can ALWAYS get the right girl there)
- It's worth it to "drain/finish" clients with a virgin for that 50% cash bonus. Ideally you want to hit "Obedience 3" to sell them off...but your Stamina/Mental drop so fast that they don't last that long. And your training is probably not focused on them to sell but on escorts, Oni, or Dark Fairy. Oni is super important to train (while in heat/full moon) so no Stamina/Mental Damage and get Affection to Lvl. 3 (Fortune Summoner) for rich clients.
- One thing that wasn't apparent is that if you don't have enough STAMINA, you take bonus MENTAL damage. Sometimes a Stamina potion is the difference between a low mental girl breaking rather then a mana potion. (Really Dagon/Kraken problems)
- If you train your escort down and don't have enough health/mana to escort them...give them a Minotaur's milk you get from training. You can put them right back out instead of resting them and they never break. (just come back with 0 health and 1 mental) So if you use the Minotaur, this is very handy and cheaper then a potion.
I would have liked to see the Youtube video how they did it but it was down on Steam. Maybe a better strategy.