since you should NOT build your leap rotations about earthquakes but mainly to keep your defensive set bonus up, the main advice here is to change hellfire/focus/restraint to the endless walk set + convention of elements.
I wonder why you use lut socks in cube. Get some useful item there. Cindercoat comes to mind if you're using Fire Seismic Slam.
Regarding your question if AS or AD, I would overall say it depends...CDR can be a good stat if you're using CoE, maximizing Wrath of the Berserker with your prefered CoE element up together with WotB most of the time. Or even RcR.
You also should consider going Bloodshed on Battle Rage. If you die too much that way, you can go Endless Walk + Unity instead.