EnglishByzantines can already start making some Limitanei early on to defend against the King.
Cataphracts will absolutely butcher massed Longbows.
There is nothing the English can do in feudal age against Varangian Guards. However, a large clump of Longbows can grind down Varangians if you only have one or two, so thin out the Longbows first.
When facing English longbows, the problem for Byzantines is their limited production. Byzantine longbows are a great auxiliary unit, but it's not enough to just play one-on-one.
Longbows are slower than normal archers, making them easy for Varangian Guards and Javelin Throwers to catch up.
Age of Empires IV © Microsoft Corporation. AOE4.pro was created under Microsoft's Game Content Usage Rules using assets from Age of Empires IV, and it is not endorsed by or affiliated with Microsoft.