I was in two minds if I should share but considering the huge energy cost 20x588 I think this is actually intended and funzio is finally got the good items in the right place.
Each time takes about 2 days depending on if you level or not but I have now done Kane de silva in octagon 3 times and gotten.
1 x cage fighter pads 15a 27d armor
1 x the iron fist 30a 19d melle
1 x tough guy low rider 27a 30d car
This is a nice change since every item will be at least a small upgrade for most people