About SS rumble discussion just my two cents: originally leap was a boulder toss build. This was changed only because of the GoG belt and its bad design. They even edited an SS rune for it to make fury dump.
I would like to take your attention to skular salvation and boulder toss interaction. If pro-slam is not going yo be made op, we will need to shift the item interactions to skular salvation-dread iron and boulder toss in leap quake builds. Probably EQWay will need GoG and SS rumbke. With a different leapquske avalance boulder toss concept Dread iron-skular-boulder toss