About Mono and wonder dates:
First of all, Mono is certainly needed sooner or later. Why not benefice from it earlier than later?
And Mono don't delay much the tech path: before Fishing, pop can grow in Vaja and we can whip the WB as soon as Fishing is finished so doesn't delay the exploration; the same with Lighthouse and GLH from Sailing; we don't probably need Pottery that early.
About wonder dates. Pyramid (I tried at t111) can be accomplished earlier because I built a temple before it. GLH (t123) is not later than any of the previous tries.
About Currency:
I keep my first opinion: it depends on how many AI we meet.
In my try, when Maths is complete, each AI has 3-6 cities. I met 3 AI (one by WB) and had 2 coastal city + 2 inland city. 8 foreign traderoads can be fulfilled. But with one more coastal city, there will be no quota for foreign traderoad
However, after my REX, by 150t I had 9 cities in which 7 coastal, Currency is really limited because there will be no foreign traderoad for us. IMO, it will only be interesting to meet more than 4 AI. Of course we have an option of setting down 1 or 2 city on the islands. Let's see.
About GP and bulbing:
I think the academy is always interesting in Delhi, for research and culture. That's why I tried to rush it earlier with the first GP as a GS. I will say ok to settle the rest instead of using them for bulbing. As I see it, settling GP does really matter if it's a GS, GP or GM and we can settle the extra GPs we don't want; however the Academy should be ensured so I'd like to do it early.
Another reason for rushing Academy, it's we agree on beelining CS. It works much better with Academy. Also refer to what kossin said:
Unless we add a lot of Cottages/workshops in Delhi, 'earlier' CS mostly allows for earlier chain farming as Delhi doesn't have that much commerce or production in any case.
I think Delhi has to be a CE cap with decent cottages to support the REX, especially if we don't have enough foreign traderoad from GLH. It's a pic of Delhi in my play:
GPP for the second GP will be polluted by the Oracle and mids. Without doing anything, it'll be 60% GP and 40% GE. A GE is desired to be saved for rushing the UN, but really annoying to have it early. If it has to be a GPriest, bulbing Theo will be very interesting for Culture, wonders (AP and St Sophia) and an extra happiness (annoying problem without HR).