Heh. That dragon breath conversion weapon actually does pretty cruddy (relative to its general area progression wise, anyway) DPS, iirc. Think its projectile is one of those that interferes with other stuff, which kneecaps total output
hard. Was something along those lines. Remember toying around with it for a while and then realizing it was more pretty than good... though it is very pretty. Good illumination weapon in base thorium, can't even lick the feet of a clockwork bow (with something to cause the arrows to glow) or burning sky.
So far as ammo goes... even with ludicrous firing rate, you'll eventually get the means to stack up enough conservation chance you can still use non-endless ammo without much concern. Amusingly enough, though, I actually kinda' dislike the quasar, heh. It's a'ight, but it can be out DPS'd by a monsoon (tsunami upgrade, though that does take killing fishron), as well as a number of other ranged weapons (and we'll not talk about throwing, of course, since a white dwarf setup takes a dump on just about everything until you're getting into jungle dragon territory).
I'd definitely recommend checking out a clockwork bow... pretty sure you can build them with just luminite (and gears). Can't recall if it can actually out damage the quasar, but pretty sure it can get close and the illumination aspect is hard to beat (until you get the burning sky and can cover the screen in fire)... plus you basically don't have to aim. Remember it doing particularly solid damage to providence, since it's best vs. large enemies. Just make sure to comparison check (probably via DPS meter, or some sort of enemy benchmark), as the listed damage on a lot of late game weapons range from useless to outright deceptive, heh. Pretty sure providence drops a fairly nice bow, too.
Also yeah, those 2 slot ember staff things are pretty beastly, as mentioned. Definitely try them and compare DPS meter readings or whatev'. You'll eventually get to see a minion summon that takes a full four slots, ehehe (and is actually good enough it might be worth, and definitely is for at least one).
... in any case, today's number is 4. Four minutes of a zerg potion'd blood moon (mind, this was after 1.5 nights of merely candled blood moon failed) being funneled into my inventory to get a shark tooth necklace to drop. And when I say four minutes of a zerg potion'd blood moon, (fair warning, it's fairly large because I'm too tired to fix the sizing)
Got fed up enough with that 1.5 blood moons of no show I decided I needed a zerg arena. Burrowed through the batch of land somewhat leftwards my main I had been using for some boss farming and to deal with invasions.
That line of eyeball banners in the full one is what happens when you eat an entire bloodmoon with a zerg potion going. Potion lasts a little longer than the moon (like 30-40 seconds remaining), but eh. Faintly disgusting amounts of drops trashed aside, I ended up making around three or four hundred platinum by the end of it. Finally got my sharktooth necklace, with two more dropping by the time the sun came up. Waifus hitting for around 1k a hit, projectile wise, birbdragons doing, uh. More. Four slot or not they're pretty monstrous damage wise.
E: Oh, and definitely check any new throwing weapons vs. the mjollnir, doubly so if you actually rock the book/dwarf combo (pretty sure both at least the providence drop throwing weapon and the shadow dagger can out deeps it with that combo). Oddly enough, sexy as the hammer is its damage is kinda' sketchy relative to some of the other stuff roughly where you're tooling around.