I have put some numbers for the buildings with the pdf provided here.
N_Faker wrote:There is a card list over at GameboardGeek
Buildings (minimum to build with the perfect workers)
Bower and wooden shack 0 VP : 1 apprentice; cost 2c; 1 play; profit 6c and 0 vp. (6c_0VP/play)
1 VP and 6 coins : 1 laborer; cost 3c; 1 play; profit 3c and 1 VP. (3c_1VP/play)
2 VPs and 8 coins : 1 apprentice and 1 laborer; cost 5c; 2 plays; profit 5c and 2 VPs. (2.5c_1VP/play)
3 VPs and 12 coins : 2 laborers; cost 6c; 2 plays; profit 6c and 3 VPs. (3c_1.5VP/play)
3 VPs and 14 coins : 1 craftman and 1 laborer; cost 7c; 2 plays; profit 7c and 3 VPs. (3.5c_1.5VP/play)
4 VPs and 16 coins : mostly 2 craftmens ; cost 8c; 2 plays; profit 8c and 4 VPs. (4c_2VP/play)
some can be built with 1 laborer and 1 craftman; cost 7c; 2 plays; profit 9c and 4 VPs. (4.5c_2VP/play)
5 VPs and 18 coins : 2 masters for Watchtower and Chapel; cost 10c; 2 plays; profit 8c and 5VPS. (4c_2.5VP/play)
those with 4 ressources : need 3 plays: 1 master, 1 laborer and 1 apprentice: cost 10c; 3 plays; profit 8c and 5VPs. (2.66c_1.66VP/play)
Aqueduct : 6 VPs and 20c : 2 masters and 1 laborer; cost 13c; 3 plays; profit 7c and 6VPs. (2.33c_2VP/play)
Castle : 7 VPs and 20c: 2 masters, 1 craftman and 1 apprentice; cost 15c; 4 plays; profit 5c and 7 VPs. (1.25c_1.75VP/play)
Cathedral : 8 VPs and 20c: 2 masters and 2 laborers; cost 16c; 4 plays; profit 4c and 8Vps. (1c_2VP/play)
Maybe there is better combinations, you can correct me if you want.
Tools do not change the number of turns just the needed coins.
My conclusion : Best buildings are the 16 coins, watchtower and chapel, followed by 14 coins buildings.
All the 20coins buildings take too much plays.
If you use masters to build, they cost more than my values BUT they take only 2 plays for all the 2 plays buildings (2 to 5 VPs)
Hope this helps