ECC, you can always use the Eden or Plymouth unit reference tutorial. You conveniently get an example of all weapons on each chassis.
EDIT: Just to be clear, you can only really use those for 1 on 1 cases.
Also, how hard do you think it would be to make a blank map with just some units on it? If you don't know for sure, it's just a matter of putting in some TethysGame::CreateUnit(Unit <handle>, map_id <chassis>, LOCATION (x,y), <playerNum>, map_id <weapon>, <direction facing>);
The only reason someone can't do such a thing is because they don't want to. Or are mentally retarded, but we have yet to see an actual case.
Of course, if you're too lazy to make them attack eachother, you would need to place the units in separate groups and have them attack each other.
The game has been around since 1997, and some people around here have, over time, made plenty of empiric observations. Check the tech files for hard data if you so wish, but the fact is set in stone, that there is no super weapon in vanilla OP2 (EMP missiles are debatable, but shouldn't be considered as such, since there are counters to it. Super weapons by definition pretty much have no counter, other than destroying them before they fire).
Lastly, the more you irritate people, the harsher they will become, the more you will be irritated by their harshness and the more you will irritate, thus completing a downward spiral. I strongly suggest some fresh air.