Talk:Soraka/@comment-95.144.12.207-20121130213345/@comment-62.1.234.198-20121227184716

The comparison is logical, however keep in the potentials utility-wise:

Karthus ulti does NOT guarantee a kill (let alone 5 enemies killed), while Soraka's ulti guarantees a heal (health increase, the opposite of damage, to be exact).

Karthus ulti is powerful in its potential to kill 5 people and it's extremely high potential to grant assists gold, there is no doubt about that, however Karthus is a dedicated mage who should at least be able to be useful as a primary damager throught the game (no buts, no exceptions), while Soraka is a dedicated support who does NOT have the duty to provide primary damage.