Does the revenent's ruination spread necrosis/LD that was from earlier ruination casts? IE. assuming my necrosis/LD has run out, but the revenant's one is still ticking, when he casts his ruination, does it reapply necrosis/LD again?

I have tried my best to test this, but its just too difficult as the revenant's necrosis and looming demise don't show as icons on the targets.

As a secondary question, with vengeful spirit maxed, does the dmg increase from blood corruption make revenants closer to zealots when it comes to ST DPS? I read somewhere that revenants scale better with gear because they benefit more from int while zealots benefit from wisdom (which converts to dex).