The Oathsworn (Kalista)
Just a few days ago i ask in twitter
@RiotSupport if was a way to change the Oathsworn (kalista mark ally) in case you missclick it or the mark goes afk, and moments later they answer me @juanjovc26 Second time we have heard this today and it's a great idea. Post it here: (in this board), so of course i reply at them, so that means that there's no way to do it right now? and once again they answer me not yet, but if you voice your opinion the developers may see your idea and think its a great one!

So i'm doing it and i hope the developers see this cause is really necessary to have a way to change the Oathsworn target in case your support afk or dc. And actually it can be more useful cause if you can change your Oathsworn from your support in later stages of the game it could be use even more as an engage tool if your support is a squishy one.
Well thanks