It has to be Stoneman as replacement for Ballance. Plus the next test is at his home ground the Oval, which will be a help to his confidence. I had not realised Stoneman was 30 though.
Unfortunately Haseeb Hameed is having a wretched run of form this season. He's has barely scored any runs and his first class average for Lancs and the Lions is currently 15. His time will come as he looks a class act.