Maybe I should make a website. I'll put all my tips there instead of typing it every time, especially on mobile device.
Every card overclocks differently depending on your luck in the silicon lottery.
You want to use a software tool, any in OP will be fine. It really doesn't matter which. What you want to do is start increasing the core clock by 30 MHz and then run stability test with ungine heaven benchmark. You want to look for artifacts and high temperatures. If there's none and temps are under 85C after a run, increase the memory clock by 30 MHz. Then test again. Do one at a time in this order until your temps are close to 85C or you start to see artifacts, then you back it down a notch. Since you are not overvolting, then you have reached your max OC. If you want to increase voltage, then you wil slightly increase voltage and OC again, until you hit 1.3v. What you can do is set the msi afterburner temp limit slider to 90C.