I say tinker with some lead. It's a cheap experiment. Start with just 2 grams of lead at 3 and 9. So a total of 4 grams and go from there. I cut my lead tape into 1/4 inch strips at about 4 inches long. I can then layer the strips if I need more lead. This way you can put a strip on either side of the strings at both 3 and 9.
It's amazing what little bit of lead will do. I had the same problem with a Prince EXO3 Tour 100. Tinkered with lead and problem was solved.
The racquet you have is a great platform for tinkering.