Just attacks are timed Burst attacks. Just attacks deals maximum damage range and require no risk unlike regular untimed burst attacks. However, it will still acquire Risk if you use the final sword skill hit. The last sword skill can also benefit from Just attack but the timing can be tricky to pull off.
To execute Just attack, observe the glowing ring effects that occur during a burst attack. The initial glow will fade (shrinking), when the glow is almost gone press the second burst attack, if you did it right there should be a 2nd glow but it extends outwards.
Low Risk Variation
If your goal is to maintain risk at a low level. Use the 1st just attack then dash cancel to a new combo then dash cancel again on the 1st just attack,
You can only reduce 1 level risk bar per combo.