search in:
battle/skill.conf
and search:
// Minimum allowed delay for ANY skills after casting (in milliseconds) (Note 1)
// Note: Setting this to anything above 0 can stop speedhacks.
min_skill_delay_limit: 100
// This delay is the min 'can't walk delay' of all skills.
// NOTE: Do not set this too low, if a character starts moving too soon after
// doing a skill, the client will not update this, and the player/mob will
// appear to "teleport" afterwards.
default_walk_delay: 300
And tell me what it says.