Honestly, in my experience so far, cavalry has no fear and just slides like a mountain through my infantry. I do not even bother with spear infantry because they get scattered by cavalry and then mopped up by enemy infantry or archer units. So my basic setup for my soldiery stands as: heavy melee infantry (mix between shield and berserk units), archers dominating the majority, with cavalry as a screen or diversion. Much like how I played back in Warband. I really wanted to see spear infantry do their job, especially because I have been played Rome II: Total War, and just watching cavalry get obliterated is both immersive and rewarding. I am not trying to necessarily compare the two games, but in this instance I was hoping for better. Using spears for my character is certainly a lot better than in Warband, and I am footslogger, so that is a nice upgrade from the previous titles. However, I am no Greek hero, so I rely heavily on Javees&Shield, and then 2hander in the crush of melee.