I am playing for the first time on normal as Byz and I was wondering what are the indications of when are the best times to attack the ottomans? I want to know what are the things to look out for when is it best to strike and other than the obvious low stability or getting caught up in a big war. I don't know what the reason is but I suddenly lost core on Edirne and I didn't do anything and it would be too early for the cores to expire.