PSA: New Players
No one outside of shop owners, content creators and the random lucky ganger with an early pre-order arrival has played N26 yet. Most of us haven't even seen all the rules yet and we don't know what is going to be in the new journals.
We don't know what is going to be good, or how to build "the best" list and, to be honest, even if we did that isn't the point of Necromunda. And, importantly, we don't know what gang you personally are going to enjoy playing.
Please stop asking.
Go with what looks cool. What sounds fun. Worry about the other stuff later.
Edit: Some people seem to think that I'm insisting no one asks questions or should already know all of this.
I am not.
I am not having a go at people,
I am not making fun of people.
I am basically just pointing out that no one has the answer to these questions just yet. If you are looking to get into Necromunda, just buy the gangs that appeal to you from a lore and aesthetic perspective. Do not buy a gang on how "good" they are or aren't, because that entirely misses the point. You're creating a gang of weird little underhive goblins, not a super optimised military squad.