Dazzu's post in Crit +1 per skill level was marked as the answer
In status.cpp, under the status_calc_pc_sub function
Under this code block:
#ifdef RENEWAL
if ((skill = pc_checkskill(sd, DC_DANCINGLESSON)) > 0)
base_status->cri += skill * 10;
if ((skill = pc_checkskill(sd, PR_MACEMASTERY)) > 0 && (sd->status.weapon == W_MACE || sd->status.weapon == W_2HMACE))
base_status->cri += skill * 10;
#endif
Insert:
if ((skill = pc_checkskill(sd, PD_MACEMASTERY)) > 0)
base_status->cri += skill * 10;
Dazzu's post in Crit +1 per skill level was marked as the answer