There is this timing for the Byzantines when they have the first batch of longbows, a few horsemen and plenty of Limitanei where Delhi simply cannot have enough to actually take the sites when it comes to this mass. And the very specific build order to do this is not gathering any more gold than necessary, pulling off of the stone somewhat early, and making sure there's plenty of villagers on the berries to get the olive oil needed to get that mercenary out early.

It's a good choice to decap the middle sacred site with your main army because it makes it difficult for Delhi to run through the middle to the other sacred sites to deny your decaps.

You can go all the way to four Cisterns relatively early on, and it's kind of necessary because you want to outscale the Delhi. You want to stick around in Feudal Age for a long time while still outscaling Delhi, because baseline Delhi with the Ghazi Raiders has got the better horseman unit.

Wheelbarrow in general is very nice for the Byzantines as they start off on the berries and berries have more walking time. Especially when your opponent like the Delhi Sultanate is most likely going to be starting off with Ghazi Raiders, that early Wheelbarrow helps your villagers potentially escape dicey situations.

When you are playing against Delhi, their upgrades take a while. Even with many scholars, there's a little bit of an opening to do damage because their upgrades aren't in yet.