I took my first practice test of the summer in late June and got a 1320 (680 Math and 640 English). After a month of some on-and-off grinding during July (procrastination included), I took Practice Test 7 and got a 1400 (760 Math and 640 English). I wouldn't really count that as a win because I was studying the English stuff and none of the math stuff—Desmos is super clutch though.
I also figured out a way to make the English section a bit more manageable: just do the writing questions first; yes, the Standard English Convention and "Form, Structure, and Sense" questions FIRST.
Note: the 1320 practice test is on the left and the 1400 one is on the right.