With the range mod the Atomos can be a very handy room clearer, and it chains through walls as well. Just aim at a fresh corpse and it keeps on chaining. The main drawback IMO is that it locks its beam at a random spread, so you generally have to adjust your aim after you see where its pointing.
pull that magnum force off it. vanilla atomos has 100% accuracy.
Damned Registrations that melee weapon is not "half bad", it's one of the best available, even better than its complete version.
if you want easy xp, join sector, defense or interception missions. draco on ceres is the most used mission for xp, four waves are enough to almost max anything. trust a mr 19, there's plenty xp.
if you want a shotgun, aim for hek/vaykor hek and tigris/sancti tigris. the vaykor hek is one of my favourite weapons, hits like a truck and can easily have a magazine of 11. the sancti tigris is the hardest hitting weapon, it oneshots everything in t4 missions, oneshots trash mobs in the last sortie mission too, it's brutal, but it has a very tight spread and only 2 ammo per magazine, which most of the time you fire together. you'll spend most of your time reloading, but the mobs will spend all of their time dead.
i can sell a vaykor hek for 40p :-" as soon as you reach mastery rank 12. same requirements for the sancti tigris. normal versions haven't these restrictions but of course are less powerful.
then there's the sobek, which is stylish but requires some rare and expensive mods to truly shine, and the kohm which maybe it's not as powerful but has *lots* of ammo and sounds like a tank engine which makes it absolutely hilarious to take along.
the dragkueen is a gimmick, it can be sort of fun but it takes timing and time to be used at its fullest and you're going to lack both in the middle of a fight.