Time to debunk said points. WALL OF TEXT RIGHT HERE.
Red Queen being sluggish in movement is just a weakness of using the sword, a weakness that Nero has long since overcome with his training, he's incredibly flexible with it whenever he's fighting demons and is especially good at using his other weapons to make up for the weaknesses, also DMC characters do not give a crap about whatever weakness a sword might have, in this same series a dude managed to beat a master Yamato wielder using a freaking broadsword, weaknesses don't hinder anyone in DMC at all.
The revolver itself isn't too impressive, but the homing swords it makes in Devil Trigger are the real kicker, those will follow Akame and upon contact, they'll explode, ending the fight.
Devil Bringer, to say Akame can impale the arm is wrong, Nero very frequently uses this thing on multiple occasions to block attacks, or god sakes he literally blocked a full on Stinger from Dante in the very beginning of the game, and uses it to block Rebellion in the boss fights, there is that Totally not an outlier, where Yamato pierced his arm but when you consider it ignores durability with spatial Manipulation and Nero was completely defenseless during that time, to say Akame can impale it doesn't make sense.
Nero DOES lead with Yamato though....It's the first sword he uses when he fights Dante in a rematch, it's the first sword he uses in both of the Savior fights, that's his weapon of choice by the time he gets it, show me a moment post Yamato where he doesn't have the thing out and ready, it's his weapon of choice by the time he gets it.
The second point is kinda meaningless, unless you believe Akame will do a stealth tactic in the forest which, she rarely ever does if at all.
Now about skill, Akame may be around Equal with Nero but let's just compare. Nero, completely trash stomps demons of the underworld multiple times in the game, and his former trainer, Credo he managed to defeat in his base form before he required Yamato or Devil Trigger.
