slumpy - 22/19 means he's playing 22% of hands, raising 19%, which means he's probably not limping, and is rarely calling raises. His pre flop strategy should be considered solid.

ats means attempt to steal... so he's attempting to steal 35% of the time... this is how often he's raising the button when it folds to him.

To answer OP - it depends. I'm no longer in the habit of playing my range in any static way... I can 3bet AA here and I can flat it... same with 89s... much depends on dynamics, in particular how often I've 3b him in similar spots so far. If I've been folding a lot, my 3bet range is gonna be a lot wider than if I 3bet him light last time he attacked our blind. There's so many more factors that might influence how I play my range, many that probably shouldn't be of influence but they are. How much sleep did I get last night? Is it hot? Am I hungry? Am I running good? Am I in a good mood? etc

Sorry I can't answer your question properly.