MiniMeleeRumble
Yes you are right the gun needs to make a big jump, it crashes everything with a weak movement but is useless against everybody else. In its current state Numbat can not handle the top-10 micros it ends 5th or worth (compared to Wallaby who can handle it very well) but against the top-10 nanos it works superior. But with a little time i'm sure i can make the gun a little better.
My guess for Numbat-Move and Diamond-Gun is, it will not work very well. It looks like your gun needs a lot of scan info and Diamond is hugging the edges/corners to bring the radar in a good scan position. But my risk movement brings the bot most of the time, if its too crowded, out of the edges/corners. So i'm not sure if i can get the needed scan info to feed the gun. But it sounds like worth a try, just for the curiosity.
If i say 1vs1 it also means in battle 1vs1's it happens to often that i get caught in a 'duel' and loose a big chunk of my energy just to put down an oscillator mover. And loosing 1vs1 against top-30 bots is something i really have to solve :). I bet Neuromancer is quite good at 1vs1. maybe not against Diamond :), but everybody else should have a hard time to bring him down.