Patch Available - KMST 1.2.456

210m per second?

Yup. Screw this.

Well still possible
Technically a bowmaster for example doing "only" 10M DMG per line at 22.5 arrows per second (2 lines plus 1 AFA) will deal 225Million HP (!) per second. And that is only 1/5th of the cap, while I am sure there will be loads of people going over this.
No I dont think it is impossible, only for the unfunded. Unless NEXON released some major DMG buff for everyone in upcoming updates.

someone give me the damage a mercedes with 2M range does with RoI please, quite sure it doesn't even come close to 10M a hit

And mercedes hit TWICE AFA...Should be not to hard xD