I'm gonna say this the simplest way.
1) Buff the base chaos reach duration/dmg or both. Either Double the duration/dmg or both.
2) Rework Geomag, its had half its use gutted. Just give it the ability it previously had. This is not enough, so you add a new ability that makes Chaos reach a one and done. You charge up chaos reach and it shoots like a railgun, no continuous beam.
It has to buff the super dmg to compete with the highest super dps.
Problem solved, you don't need to devote anymore thought about balancing since it offers what all people want.