Helenius isn't shit. He was a top 5 heavyweight having knocked out a couple of former world champions, and everyone picked him to knock Chisora out. Chisora just bullied him on the inside. While I'd expect Ruiz to come in with a similar game plan and lay on the Finn's chest, I don't no if at that stage Ruiz had the speed or the movement to get inside the jab and straight right.
I'm also not sure that that version of Ruiz could survive the punch that del did in the 1st or 2nd round (the one that sent him back on the ropes)