Azrakaa, Fissure, Flame torrent, whirlpool, tempest “kind of”(requires CDR), Guardiands Gaze(tho that’s more for sustain/lifesteal), aand feel like i’m spacing out on a couple 
you can’t really compare them like that, because their dmg/effect is balanced around their cooldowns and proc chance
as closest example to fissure we have Ravenous Earth, which functionally is the same type of skill, just diff dmg types and cooldown, - and there exist plenty RE builds
Fissure is strong because it shotguns, has decent duration compared to cooldown, so you can have multiple up at same time, this paired with its dmg amount makes it overall a very strong proc/skill,
^hence why i mentioned it can sometimes be worth even to include on non-fire builds provided you have conversion and don’t sacrifice too many devos to reach
as counter example we can take Blades of Wrath, it’s also a shotgun, an immensely strong on, both single target and aoe
but it’s much more finicky conversion-wise and devotion point affinity-wise to include in a non pierce/phys/“right side devotion” build, which is why it’s not exactly often included in builds leaning towards diff damage types
likewise aetherfire is strong, but you don’t often go half aether half fire dmg, so you need high conversion on one of the damage types into the other (or both into a 3rd)
it sorta goes for most devotions, you need to be able to decently utilize the dmg type to make the cost worth it, since they usually aren’t cheap for a reason, given their high dmg potential. But when you can, you pretty much almost always want them, sole exception being the devo cost/route becomes too sacrificial in terms of other stats or bonus dmg, ex being that flame torrent can often be seen skipped on some fire builds, where ex Bat/twin fangs or phoenix or a 3rd diff might be more desirable overall
