Players with so many skills are eye candies, but in reality they give you less than you expect to. They could be dominant, but only in neutral offenses, (Base Offense, Patient, PTB). Both inside and outside tactics have bonuses and penalties that should be taken into our advantage:
For example, a 16 JS/11 JR in LI or LP will struggle if encountered by a 17 OD because of the penalty this offense has. So, why pay so much salary to have such players? On the contrary, a big guy in a team playing Motion or R&G why should have big IS in expense of JS/JR? He won't have so many inside shots and he won't be cheap at all to have him in your roster.
Right now, I'm building two special players, one PG and one SG. When completed the PG will be like this:
9 1
18 16
18 15
12 12
2 5
Salary: 64.000$ and potential needed only 7 (perennial all-star).
My SG will be like this:
11 1
19 16
20 13
13 12
5 4
Salary: 60.000$ and potential needed again only 7.
They will be both great defenders, they won't take so many shots because of their low JS/JR and high PA and they will score almost always in the rim either by driving layups or inside shots assuming my team has high PA in all players.
Apparently they won't be 10 million dollars players but if my theory is correct they will be extremely useful in my team (playing inside tactics, of course).