Make Out Of Sight proc at the start of a mercy

[Redpaws]

Currently, Out Of Sight blinds all enemies within a 18m radius after you finish a mercy, which is handy, but... Can we make Out Of Sight proc when you start a mercy instead?

Reason why:
Right now, a big grievance I have with mercy kills is that in high level missions (like ALL kuva lich missions), performing a mercy with ANY enemies nearby means your sentinel immediately blows up as everyone focuses it down instead of focusing on you.

Making Out Of Sight proc when you START a mercy instead would blind nearby opponents while the mercy is performed rather than only after, which might actually give your sentinel a chance to remain in one piece during kuva lich missions.

Alternatively, just make the sentinel untargetable/invincible for the duration of a mercy.