isn't anis's ability to drain energy from literally anything and then become the most powerful nikke for a few seconds just a liiiiittle much? like, how are we ever gonna lose a fight with these 3? maybe they nerf it by making her kind of a doofus with it but I cannot imagine losing a fight with anything other than the queen if those 2 just defend anis, and then after she drains the enemy and the other 2 have worn her out, she pulverizes them with liliweiss fists

So far we haven't seen just how effective her punches are against anything bigger than a nikke. The scene mostly highlighted the increased speed and awareness but it was a point that they still needed Neon, Rapi and Dorothy to finish off Sixo. They did say that Pretty was the closest in stats to Liliweiss but that still gives the writers room to power her down to narratively acceptable levels since they didn't say that Pretty was outright equal. And they could also say that Anis' usage can further degrade that power since it's an indirect use of it through the armament.

Plus the energy absorption is a strong limiter. Just lugging around a fuel cell or something probably won't cut it given she needed to drain every E2 crystal to the point of turning them to dust, and she hasn't been shown capable of draining enemies directly like Rogue from the X-Men. It probably has to be "loose" energy if that makes sense. Since neither Rapi nor Neon are getting energy weapons (ironically Ingrid plugged up this loophole when she was adamantly against energy weapons earlier in the chapter) that means Anis can't abuse this ability whenever she wants like how Rapi can casually fly around with the drill. They'd need to staple on Matis for that sort of strategy since most of their weapons are energy based, and Anis will probably have to absorb most of their energy.

And while they can catch enemies off guard the first time, if say for example Altruia survives an encounter and lets the rest know about how the Armament Star works, they would simply avoid using energy weapons around Anis moving forward. It's a trick that should only work once if the enemy is smart.