They are the easiest players to play against. Even I can put a "5/2" On a range. Just rape their blinds with ATC. Fold to their 3 bets without a premium hand.
TT+ ,KQs+, AQo+
Rough estimate
Just rape their blinds with any two cards. I wouldn't really sit at a table with players like that to my right.
It's a very general statement, because obviously there are many more factors, but you can pretty much stack off with any hand that beats AA in a raised pot post flop.