After years at Monarch I recently came back to the game and decided to go for Emperor. I have won my first three games at Emperor (vassaling the map with cuirs or cavs) and this is my fourth, and yes, I am struggling to get the economy/research going. I had some barb stress in the beginning and possibly did not build enough workers early on. My previous Emperor games have had more grassland for cottaging, I guess I wasn't sure what to do here with all the forested plains.
Actually the screenshots above are from me going back 40 turns to try again, after having fatally crashed my economy by failing to research Sailing and never reaching Currency/Construction/Calendar-level even though I got gold from conquering Barcelona swordrushing her without pults. (A desperate move to get money and a piece of the cake when Cyrus joined Shaka's war against Isabella.) Elepult is otherwise a favourite, but as I never reached Construction... I took two nice barb cities to the West but they taxed my money fatally as well and I never got to settle the "Moai city" even further to the West. I had nothing to build but units so that also increased the burden as I went along never getting to Currency. My people started going on strike mid-war and my units went popping. I can never delete units myself, though, seems such a waste of

. At the time I quit, I analysed my mistake with World Builder adding techs: +4

at 0%

had I had Fishing; +15

had I also had Sailing; +37

at 0%

if I had reached Currency. I sure could have used that money!
Not roading to Isabella is indeed wrong, although I think I get around it now with Sailing and trading along the coast, no? Too much unclaimed land to the East to road in that direction. Shaka has attacked Isabella from the North and the other war is too far away from me. I figure the play here should be to settle as much land I can since the others seem insulated from my piece of the continent. Defenitely wat the two barb cities and my Moai location to the east, and also the the iron/cow site to the West and the resource heavy location Northwest of that, before Victoria comes my way.
@Gumbolt
The enclosed save is from 350BC. I use the Better BAT AI mod and play with tech trading off.