After doing a simple overview for the hyper skills we got and are going to get, i found out they have several similarities among them.
You can skip this part if you find it boring.
Spoiler
I will lead the topic with Heroes and Novas' hypers.
Firstly, let's start with Aran's, The Beyonder. This kind of hyper skill acts as a finisher of the current 4th job attack skill, The only hyper that similar to this would be BaM's battleking bar.
For Evan, his hyper skill is basically a troll, and he is the only class that gets summon-type hyper. (Don't flame me, fellow Evans)
Next, which is Merc's Wrath of Enreal. She gets a hyper which can attack a bunch of mobs but accompanied with a very short cooldown which is 8 seconds only. Drk's dark synthesis, NL's four seasons and Viper's unity of power (can only be used when the energy bar is full) are similar with this one, or Demon Slayer's Cerberus (if you want to include this) which has only 5 sec cooldown.
After that, Phantom's Rose Crate Finale is an ultimate which basically works the same way like Arch mage's ultimate and is exactly the same with many hypers for other jobs, like Kaiser, Bishop, Hero, Bowmaster, Marksman and so on but they are accompanied with different cooldown ranging from 15/30/90/180 sec. In bowmaster's case where the skill can inflict a debuff to the boss like Wind Archer's Monsoon, or in bishop's case where the skill can revive people in the party.
Luminous' Armageddon works the same way like Warriors' magic crash or Demon Slayer's Binding Darkness which basically "freezes" both monsters and bosses, and it is similar with Paladin's smite.
Kaiser is already stated above.
Lastly, Angelic buster's supreme supernova is a skill which attacks the monster continuously while you can do other things while the skill is active. The hyper which is similar to this would be Mechanic's Distortion Field, Shadower's veil of shadow. Not sure if Cannoneer's rolling rainbow cannon can be included there because it seems like you can't do anything while the skill is active or the owner does not want to do anything(The investigation is based on Youtube's videos).
Other hypers which do not stated here would be:
-F/P 's Migeidoo Flame, which works like Soul Seeker or Shield Chasing.
-I/L's Lightning sphere is a keydown skill which works like BaM's Tornado Spin or Phantom's Tempest. Not sure if DB's Asura can be included here because it is stated as a keydown skill in max's blog but you can still move while keydown-ing this skill, or is it work like a buff because i can see Asura's icon on the top right corner.
Correct me if i miss or get anything wrong here because there are too much hypers to be stated!
All in all, these hyper skills are mainly used to OHKO bosses which have many parts like Zakum or Horntail if you watch KMS bossing video frequently in my opinion. These skills are rarely used in training or mobbing because we can already OHKO the mobs using our 4th job skills. In a nutshell, do you think attacking hyper skills are mainly designed for bossing only?