although it sounds like 'not a bad idea in the grand scheme since he isn't doing damage' something about it just rubs me.
he's electing to effectively specialize (as a healer), so he should accept the tactical downsides of it as well (which, in this case, means a much smaller pool of options when trying to deal with a bloodied enemy).
By the way, if he is bored of doing his astral sea and other things, don't forget he can always do other tactical things like Aid Another (for someone else's attack or defense -- with the update on that, aid another for attack is no longer an attack in itself, it is just a fient or distraction to give your ally a +2 to hit, or +2 to defense, etc), or using a heal check to grant a bonus save to someone (which is about as good as sacred flame without doing damage since your heal check may be more likely to succeed depending on modifiers), and so on.
he's electing to effectively specialize (as a healer), so he should accept the tactical downsides of it as well (which, in this case, means a much smaller pool of options when trying to deal with a bloodied enemy).
By the way, if he is bored of doing his astral sea and other things, don't forget he can always do other tactical things like Aid Another (for someone else's attack or defense -- with the update on that, aid another for attack is no longer an attack in itself, it is just a fient or distraction to give your ally a +2 to hit, or +2 to defense, etc), or using a heal check to grant a bonus save to someone (which is about as good as sacred flame without doing damage since your heal check may be more likely to succeed depending on modifiers), and so on.