Its more about RC progression, running blood runes from the second you can make them all the way to 99 is kind of meh, then when you run wrath runes from myths guild, through dragons, to get less xp than blood runes, this is kinda why nobodys making them. Even if it was 2/3k xp more than bloods it would make them more viable to run, and not everybody has access to the trident, so fire surge is the next best thing really lol.
Both of you have valid points, my suggestion was based purely from RC progression, its like spamming mith darts to 99 if rune gave less xp lol