Delhi sultanat dont understand how it work and blacksmith

[HasanIchess]

[Suggestion] Delhi research time

with dome of faith scholars cost 75 gold, 12 scholars cost you 900 gold, other civs with only 4 smithing tech cost them 500 in feudal and 1000 in castles, not counting mills, logging and mining camps . Therefore, the system is very good, also in this patch they reduced the research time of some, they only increased one technology, which is the fourth age, very strong.