shisui has lost its worth and even if you spend he costs hardly 10k while konon 16 to 20k. Shisui does not fits any where in meta and neither is he a really good one for ninja exam. While konon makes a really good team with kakuzu and also good at exams. Shisui is only helpfull to new players and yeah for them more helpfull than konon because konon needs a good team around. Comparison is bit similar to minato and 6 paths naruto. And when konon gets a good team(kakuzu mainly or kage gaara or kisame) she is really strong. Plus she is still used in en and cn at high powers but shisui is not. So ofcourse 80 of konon would have been too much if we remember we also used to get sakura