Hello you can actually create as a average player a 20 bomb in arena divisio 1 and are also uch Schwitzer and your aim must be very good
20 kills is currently very difficult solo. The easiest way is to say in Arena, because you get life / shield for single kills and save a lot of time.
20 kills are also dependent on luck in Division 1 but feasible, of course you definitely need good Aim and construction and Editskills.
Can I also do it as an average player