You cannot rely on all-rounders in Test cricket; you need proper batters to play on rank turners.
This is not the right tactic to play Test cricket.
It may work in the white-ball scheme of things because the pitch is flatter, with two new balls, fielding restrictions, etc.
#icc
بیشک جنہوں نے کہا ہمارا رب اللہ ہے پھر ثابت قدم رہے تو نہ ان پر خوف ہوگا اور نہ وہ غمگین ہونگے”۔
(القرآن، سورة الاحقاف)
Indeed, those who have said, "Our Lord is Allah ," and then remained on a right course - there will be no fear concerning them, nor will they grieve.