Check src > config > renewal.h
/// renewal cast time
/// (disable by commenting the line)
///
/// leave this line to enable renewal casting time algorithms
/// cast time is decreased by DEX * 2 + INT while 20% of the cast time is not reduced by stats.
/// example:
/// on a skill whos cast time is 10s, only 8s may be reduced. the other 2s are part of a
/// "fixed cast time" which can only be reduced by specialist items and skills
#define RENEWAL_CAST
put // on #define RENEWAL_CAST to disable renewal casting
if you want to disable whole renewal settings put // on each #define