After experimenting with all types of build with Gragus, I have came up with the ultimate combo of items, runes, and tactics that will allow you to be a "BEAST GRAGUS"!
Gragus is all about his Barrels- Can't land a skill shot barrel? Then QUIT. The first part of this build is to guarantee you have that ability power to push and harass a lane.
As we all should know, harassing and pushing a lane takes a LOT of mana with Gragus; hence, Clarity + Drunken Rage!
A GOOD Gragus would have already reached 2+ stacks on his Mejai's Soulstealer by the time he is able to start tanking it up!
Get your Dodge Boots! (Ninja Tabi)
I'm about to go into a game right now, so make sure you get arhcangel's and warmogs and you'll be untouchable!!
Stay legit, and OWN WITH GRAGUS!!!