Bystronic BySprint 3015 6000 Fiber - 30mm MS, I'm searching for help/parameters to cut 30mm MS without beam shap

Hello,

I'm searching for advice/help/parameters to cut 30mm mild steel with our Bystronic BySprint 3015 6000 Fiber laser.
25mm is working fine with the included parameters - unfortunately there are no ones for 30mm

I started using the 25mm parameter and increased piercing duration and pauses, reduced speed and oxygen pressure.

30% of the parts are close to perfect, 70% fail even after the piercing...
I would be very happy about ANY suggestion how to approach this.

I know that it might not be really efficient, but for cutting here and there a piece I do not need to look to closely to cutting efficiency for the 30mm