Infamous Yojack build yeah...
Problem is Diminshing Returns, any stun from the same source meets diminishing returns. (This applies to stuns, fears, roots, etc.)
1st Effect: 100%
2nd Effect within 15 seconds of the first wearing off: 50%
3rd Effect within 15 seconds of the previous wearing off 25%
4th+ effect within 15 seconds of the previous wearing off: Will fail.
Mace Spec therefore is only really practical the first time (3 sec stun, then 1.5, then <1 second). It is also too unpredictable to base a build on it.
Improved Kidney Shot is useless except for missed Kidney Shots. The DR timer starts after the stun wears off (assume a 5pt Kidney Shot for 5 seconds). That means 15 seconds after that 5 seconds KS is back to full power. That's 20 seconds, Kidney Shot's normal timer.
The usual stunlock build is something to this effect (Assuming Initiative, Imp SS, Coldblood, and Imp CS)
Cheap Shot (2-3 CP) (60 E left)
Tick (80 E left)
SS (3-4 CP) (40 E left)
Tick (60 E left)
Gouge (4-5 CP) (15 E left)
Tick (35 left)
Cold Blood + Eviscerate
Problem is, a single miss kind of screws the sequence up. I'll stick with my Combat build for PvE (Dagger for PvP)