You might want to try the XUPERMAN POWERPLAY-X in 39° or 40°. It’s about $25 on prott.vip. Don’t bother with booster at first—once you play and hit the ball hard, the sponge will naturally soften up and gain elasticity. The tackiness will last quite a while if you cover it with a film or protector and clean it only with a bit of water. Over time, you’ll notice it becomes livelier and less “dead,” but it does need that break‑in period.
Of course, if you add a very light layer of booster, it speeds up that whole process in just a few hours. It won’t add too much tension or drastically change the rubber, but as I said, keep it to just a light layer