My default tip these days is 130, but may go up to 150 for a mind blowing experience or to reward an ATF (especially one who has come back for a limited engagement). Back in 2016, 100 was not at all unusual, so there has been considerable inflation. I think a total of 200 for a typical session, including HF, is very fair.
I am of two minds on the subject of tipping. On one hand, I am sensitive to what they do and what they sometimes have to put up with. On the other hand compare that to what an unskilled foreign worker in any other job would make per hour. Their job is not particularly hard. In some cases, it may be very yucky; but in other cases, it may be very pleasurable. I have seen other foreigners (very likely illegals) do extremely hard & dangerous work for probably not more than $20/hr. So when you look at things from that perspective, 100 is not unreasonable. If they had to go back to restaurant or nail work, they might get 100 per day.
It also busts my nads when some of these girls demand a big tip up front, especially when you are a known quantity at a place like Chun.