The Hasty Aquatic Core
The addition of more Charge effects, plus the ability to scale the amount of seconds Charged (via upgrades), is what really defines the core of this build.
Essentially, every time an item gets used it Charges multiple items, which in turn Charges other items, creating a near-infinite cycle. The only caveat is that you get enough upgrades to ensure your items Charge as fast as possible.
While this build's items have reasonably short cooldowns, it is slightly slower out of the gate. However, once that first item ticks, everything immediately goes ballistic. And don't worry, the Shield spam will more than make up for lost time.
Sharkray
The namesake of the build only has one job, and that's to apply the beatdown!
Honestly, if you wanted to play a purely defensive build, you could drop
Sharkray in favor of other items. But that said, it's definitely good to have a powerful scaling Damage source. Passive builds can often fall victim to huge scaling Burn/Poison builds, so it helps to have a way to apply pressure before things get out of hand.
As an added bonus of the latest patch,
Sharkray now exists as a Silver tier item, making it easier to find early on.
Astrolabe
Astrolabe is the key Haste support that feeds
Sharkray. Aside from
Sharkray itself, every other item on board is a non-Weapon and can Charge the
Astrolabe on-use.
Once the majority of the "Aquatic Core" is upgraded,
Astrolabe will churn fast enough to keep most items Hasted at all times, barring enemy disruption.
Turtle Shell
Post patch,
Turtle Shell is appearing to be one of the strongest Shield items in the game. Alongside all of the other Charge buffs (and gaining Charge itself), it scales a ridiculous amount of Shield to ALL of your Shield items very fast.
Previously it scaled 30 Shield (at Diamond) to your items on a five second Cooldown, and instead functioned more as the defensive centerpiece, provided you had other ways to scale its Shield. Now it does both.
Turtle Shell should be first in line when it comes to upgrades, because while faster Damage scaling on
Sharkray is nice, the most important thing is getting the Charge engine running as smoothly as possible.
Pearl
Pearl received massive buffs and now has scaling Charge amounts like many other items of the patch. Even at lower tiers it's still quite serviceable, but it becomes absolutely bonkers once it gets to Gold/Diamond.
It goes hand in hand with
Turtle Shell and is the final key component that glues it all together.
Rarran put a Turbo enchant on his Pearl, adding even more Haste effects to proc
Sharkray. This is a great choice if you get the chance to apply it, but isn't mandatory for the build.