what about vayne lucian kalista mid/toplane ?
Depends on the champ. As long as they aren't overpowered or dominant for the most part they aren't that bad. Most only exist as niche counterpicks anyway, which will always exist. Something like Kalista might be a problem because Kalista in a solo lane does not utilize a large portion of her kit, for example her passive on W and for the most part her R. If a champion is functioning without some of their abilities that is likely not something we want, so we might look to make changes to help rectify that.