For Ember, I would definitely list Flamethrower. It has the exact same accuracy and likelihood of effect, but a much higher BP. If at any time you can use Flamethrower over Ember, it is superior.
That said, if someone is seriously considering Ember, it can't hurt to add in links to Fire Blast and company as well, as they can probably use all the help they can get. Anyone with a decent grasp of competitive play will rarely click on Ember, so it's not like they'll mind the extra clutter from a few links.