I don't bother with those unless I'm specifically going for all the orbs. Like, I'll get the closest one, but I don't bother with the one you mentioned or the one that makes the boss spawn. There's usually enough health to be had once you know your formations, and if you want mondo amounts of health, there's always the heart mage trick. I don't go out of my way to dig gold in the mines for the same reason. You can win without doing it, and it just breaks up the flow too much imo.