Sona shouldn't be disabled in ARURF
It's a big inconvenience for people who main her or just play Sona often. If Riot really wants to balance/make ARURF more fun (they're reason to change URF to ARURF was to make it more balanced/diverse.) they should add Sona in with changes that make her more balanced. Many Sona players including me would be really happy if Riot let Sona be in ARURF.
is a very mechanically intensive and high skill cap champion.