Who is your favorite ability nuke frame?

Hey guys, title says it. I really like the playstyle leaning heavy on the caster thing, but I don’t think I currently have one that I love. So who is you do you think is the most fun ability driven frame?

So far, building around Novas two is really fun and quirky, but getting a little clunky to spam I’m finding. I played Dagath in circuit and was having a bit of fun. I’m curious to know what caster builds you guys find have a smooth, fun playstyle while still being able to hang in the big leagues, not so reliant on weapon loadout. Thanks!