Oberon vs Nezha vs Caliban for Prime

Im missing parts for all of those and I have enough plat to buy only for one Prime version. I will eventually get them all because you know thats how warframe works, but since I really dont like trading it will take some time.

The thing is I have no idea how is oberon after rework or how is nezha doing right now. I used to play nezha like 5 years ago.

I know that oberon after rework has some nice immortality going for him, but I dont have guns good enough to just be immortal. I also saw build guide for nezha where he used temples helminth ability and new augment to make insane looking nuker. With Caliban I like the summoner gameplay in general and he is the new shiny thing, I also got his deluxe skin as a gift and it looks soo good.

Soo any tips or opinions on these three would be awesome.