I am using a tweak of v19 with a CM on attack. All i have as his PI's are this
Shoot Less
Close Down More
Tackle Harder
Roam
Move into Channels
Run Wide
But what you should ask yourself about your player is this? Will my player be any good at doing these things? Does he have decent fitness and stamina to constantly close players down? Is he good at tackling? is his Off the ball stat very high.
If the answer is No to any of those PI's i would take them off.
For example, i have James ward-prowse as my CM and sometimes if the opposition have a slow defence, i'll add in "play more direct balls" and he will play balls past the defence to my fast attacking players.
So basically you should put in PI's that compliment the strengths of the player, like "Dribble more/Less" depending on their dribbling stat.