Punishing Gray Raven 3-12 Normal Mode Low BP 3 Star Clear

Good games let you pull this kind of stunt. If only if this is not a gacha.
Quick tips:
The opening is always a gunshot. Extreme dodge that to get in some quick damage early.
To play it safer, only engage if extreme dodge is up or use other teammates. 150s is very generous. Just walk around if it is not ready.
On 2nd phase (when he starts summoning pillars), stay mid range so he doesn't use/use less of the suction attack. The spiral attack is way easier to dodge. I got lucky with the suction dodge there.
The rest is just learning the patterns and react accordingly.