Signum's fight against Cypha in chapter six of Force was pretty awesome. Wiping the smirk off her face twice in rapid succession with her speed, slamming her into the ground without her arm, and doing it all with the same reserved grace we've come to expect. If not for the Healing Factor and Divider, Cypha would have lost right there.
Nanoha has taken yet anotherlevel in badass and firepower as she goes toe to toe with Tohma and actually has the upper hand.
Newcomer Isis displaying massive skills with explosives. She also disguised her explosive materials as a sewing kit.
Deville's own entry to the fight, where he does a Dynamic Entry on Isis to knock her out in one hit and also nearly manages to get Nanoha In the Back. Without Reacting. If Fate wasn't as fast as she was, things would have turned out differently.
Fate in turn swoops in on Ville, who's already a Lightning Bruiser, so fast he thinks she teleported. There is no ceiling on the badassery of these people.
She wasn't even in her Sonic Form when she did that either.
Two words: Hayate, HEIMDALL. Too bad it gets interrupted by a Diabolus Ex Machina.** Said Diabolus Ex Machina also count as a crowning moment for the Huckebein leader, Curren. To put things into perspective she manage to reach to TWO moving spaceships, sneaking her way through Hayate's guard to backstab her and then proceeds to curbstomp said guard compossed of Vita and Erio who are already armed with Strike Cannons(weapons designed to fight her kind, an advantage Signum lacked), Curren just destroy the new toys with a simple katana and then disable both warriors by cutting them with paper. No need to use a Healing Factor, no need to exploit a Story Breaker Power, she just come and kick butt because she's just that good. That screams Badass.
Another bit to consider: Hayate packs so much magical power to the point she could still drop her nuclear magic on the Huckebein anyway, who are Anti-Magic incarnate. Even a reacted Cypha (who maimed Signum prior) was shitting herself since Heimdall phalanx shift was too much even for her dividers to handle.
Subaru pulls an incredible Big Damn Heroes in chapter, 14 where she appears in the nick of time to save a disarmed Nanoha (Tohma just finished ripping apart her Fortress Mode complete with the Strike Cannon) from a lethal attack from Tohma by catching his Divider with her Sword Breaker, damaging it's blade in the process and taking it apart with her Revolver Knuckle.
Fate gets a pretty good BDH herself. The Book of the Silver Cross is about to teleport away, wasting the efforts of the battle, and then....
The enterity of the Evil Versus Evil fight in Chapter 19. To be more specific Veyron and Arnage fight against two other EC Drivers to prevent misblaming on the Huckebein family because of their actions. At first seems they're more than a match for the two Huckebeins but soon Arnage reveals her Reacted Divider's 2nd form and Veyron just demonstrates why he deserves his spot among the most feared familly of killers by turning the tables and anhilating his opponent. He may be have the weaker weapons among the Huckebein family but BOY he knows how to use them!. Veyron displayed such badassitude here that it almost matched Curren.
What makes Veyron more Badass is the fact that he DOES NOT have a reacted divider and was holding his own against a reacted EC Driver... until he got pissed off and decided to kick the living daylights out of his opponent.
FORCE Chapter 24, instead of the evened out fight people were expecting from Signum and Cypha's rematch, the Blazing General uses her new weapons (as in, the first time she was actually using them in a real battle) to force the latter to run away in the span of one chapter. Makes you wonder what will happen when she gets that Fifth Gen device...
another one goes for Cypha who managed to fend off and upgraded Signum quite decently still being able to deal important damage despite the Gladiator unit and even able to destroy Signum needle-shooting shield with her bare fingers. Sonica confirmed on Ch. 25 that Cypha was unnaturally prideful and soft during said fight but ultimately decided to forfeit the match in order to get her job done showing that Cypha, despite being a psychotic smug snake, is a professional who knows when to priorize work over pleasure, given the final condition of Signum (half of her unit destroyed and the other half almost ran out of juice), one can say Cypha still had good chances to continue the fight or even to turn the tables but she wised up on the end.
Chapter 25 gives one to Kurt Grendel. Even though he is seen as an idiot by his family members, they are loyal to him for a reason. He knows damn well the four of them are rigged with an explosive to kill them if they speak, but is willing to do so if it benefits his family members at the cost of his life. Which is what he exactly does by spilling all information on Hades Vandein and his company to Section 6 anyway. Thankfully, he was saved because the explosive were relocated before he confessed.
Chapter 28: Another Evil Versus Evil fight. Hades Vandein shows us that he is not a Non-Action Big Bad by engaging in a 3-on-1 situation with Curren, Veyron, and Sonica. What makes it more impressive is that not only he is holding his own, but he is the first person to No Sell the Huckebein's attacks. That's right, he pulls a No Sell on two of the most notable members of a family who have been noted for being borderline-invincible.
Chapter 29: Curren is about to make an attack on Subaru, Fate, and Erio only to get intercepted by the latter two by getting shishcabobed by Anti-EC weapons and promptly electrocuted. Then Subaru promptly smashes Veyron into a wall with her fist followed by Teana takes charge to fires injection bullets into the three Huckebeins to slow down their healing abilities. Sure, Curren ends up escaping, but it shows how far their Anti-EC equipment is fairing, especially when Veyron points out they now no longer have a one-sided advantage. Yes, one of the Huckebein acknowledged how they are no longer 100% invincible.
And unlike Chapters 13-14, their escape didn't turn out very smoothly. Hades intercepts Veyron and Sonica, shoots out the latter to isolate the former, and comments how their attempt to blind everyone only helped him. But before he could touch Sonica, Veyron intervenes and takes a blow for Sonica at the cost of his heart. While the focus of the Big Bad seems to have shifted in favor of Hades, it's nice to see the Huckebein are starting to falter.