No offense to anyone.
The only reason people like Firewolf were able to use "Baranz Launcher existing" as an excuse to not have any real alternative for Dark Meteor is because Firewolf was the GM regularly making Meseta rooms until he went MIA.
Even so, 80H Baranz Launcher Charge attack misses heavily in Ultimate rendering it non-comparable to Dark Meteor since DM uses base damage.
DM naturally misses less making it unrivaled as an AOE Rifle Range Weapon.
Hunters at least have the difficult Tsumikiri J Sword to hunt and use as an alternative for Dark Flow which can only be obtained through the Christmas Event.
What alternative does Dark Meteor have which can be hunted for year round, and used? That's a rhetorical question, because there is none.