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current heart attack ultimates are useless.
The ultimates aren't what make or break the heart attack, it is simply an augment to its functionality to make it more helpful to certain play styles.
However, Violent heart attack isn't all that helpful in any situation. I would recommend adjusting it to act a bit more like your C4 version, except have it drop a 1* heart blast bomb at the enemy's death spot. It should deal a fair amount of damage but maybe not knock enemies back. (Maybe like, 125 for specialized damage, and whatever standard percentage off that for not specialized damage?)
Iron Heart Attack should stay as it is though. It's useful enough.
I love the violent heart attack! Zombie: Okay guys im out of health, bye. Alive ZombiesL=: See ya! KABOOOM!
I love the violent heart attack! Zombie: Okay guys im out of health, bye. Alive Zombies: See ya! KABOOOM!
I'd just change Violent Heart Attack into Heartburn and make it inflict Fire in a radius.
Violent Heart attack is useless, with such low damage you are better off spamming VT to chain shock damage rather than heart attack damage.
The Iron Heart attack is ok, with the defence boost you resist a bit of damage and statuses have a harder time attaching to you (yep you get a status resistance though usually enough to just walk through wisps).
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Mending is cool as it combines remedy and hp, rather make it so it has a chance of dropping a small blue heart that heals status and hp as well as larger regular ones.
C4 is way op and the lag from detonating them in places like FSC would be horrible, not to mention the possible knockback. (invinciticks could solve the OP part but ppl would whine about that).
Everlasting is nice but more entities means more lag, this would make uncollected hearts in earlier arena stages actually get you killed by lag. (rather just increase the time they appear on screen to %150 the current time)
Increased is nice but it too is OP, provided you dont take damage you can farm respawning enemies to get near infinite hp. (You could say it can overheal up to %125 and wears off after a while to leave you back at %100)