Is there any real suggestion, or is this just another "make something somehow" topic? :-/
If this is option B ...
I shall use it for repeating my suggestion.
Simply implement "Ask" option ...
That way we would have all 3 option:
Dissabled > never used.
Auto > used automaticly whenever they can.
Ask > popup window asking us.
That way if someone will feel that they dont wish to spend spellslots for each hit as Paladin ... they simply set Smite to "Ask" ...
Also if they dont wish to confrim every single Attack of Opourtunity they can make ... they simply set AoO to "Auto" ... (just as we have that now)
Also if they know they are fighting against Radiant resistant enemies and they dont wish to Smite at all in this combat ... they disable it (and should remember that after combat ends).
Everyone should be perfectly happy ... curent system can stay exactly as it is, with single easy adjustment ... no need to adjust any "order" in wich reactions will be used.
When there will be chance to use reaction all your option will show in popup window and you decide the one you wish to use ... or you simply click to continue without it and your reaction will stay unused (read as: Prepared to use Automatic reaction)
