I dont know if its intended or bugged. Earthquake spell dismounts people with any damage. Even if people have full balance -> knockdown resistance any hit by this spell just dismounts them. With both skills maxed out 50 pure blunt damage is needed to dismount someone so why it does not apply to earthquake (50 damage from eq to dismount someone with both at 100)? Another thing is it hits through magic reflect and doesnt remove it. With all above you basicly have 100% chance to dismount someone and than you just need to remove his magic reflect with another spell or, even better, letting your melees to kill your target during new animation. I think its a bug and it should be fixed asap.