Strikers Vs Buccs

Sparks does not add THAT much to the damage, crit is vastly superior for that. What makes sparks so good is the extra range it gives you, especially while using shark wave at typhons.

Sparks is actually really powerful, especially because it also criticals. You'll notice a big difference in your killing speed in mobby areas such as blue kents or himes with 11+ sparks. It's also great at zakum where you can hit nearly all the arms with sharks due to its massive range, and sparks takes care of the weaker summons easily after the arms are down.