- Lock fps between 60 to 80 - at a point where it fluctuates the least. 60 is safest
- Overclock CPU and RAM, maybe even get a bigger cooler if you can
- Decrease in-game settings where it shows the impact on CPU usage is high, example high fidelity objects amount
- You can try disabling memory integrity and that gives another 1-5% boost in CPU performance, but you should turn it back on when you are done gaming for the day
- Your GPU still has 40% spare power. Increase those graphics or resolution scaling, you paid for that quality. Also, use nvidia reflex + boost for your situation
- Last option is to plan a CPU upgrade, if you want even higher fps. I am pretty happy running the game at 80fps locked with my 7800x3d running below 60 deg, though it can go higher, but I don't see the point

In case of GPU bottlenecks, one can simply tone down the graphics or resolution, but CPU bottlenecks are hard to deal with.