I'm a relatively new player, 1year or so(not played so much since 2020..), imo there's no real competitive list atm😆, there are but don't seems to do well in tournaments:
Most played lists with better results are with: evocators+sequitors somtimes with gavriel or with ballistas support and liberators, most played heroes: lord arcanum on various mount, castellant, relictor, celestant on drake, incantor.
shootcast(simply play the 3vanguard battalions) did well for sometime but now..glass cannon playstyle and not so simple to use.
starcast a mix of drakes/good mages ballistas celestant prime and generally 3x5 libs + comet.
skyborne slayers is viable. Here I could say something but wait the juicy master of this battalion.😄