I've never been quite sure of Slades exact level of strength. At his lowest hes been stated to be "as strong as ten men". Hes also been stated as twice that(twenty men) preDCnU. Hes displayed strength higher than that many times imo. I can only assume hes even stronger now in the new dcu, as nth metal enhances strength.
Slade endures a mental attack from "The Possum", who obviously has a substantial healing factor and probably superhuman strength. He slashes away at him with swords and attempts to decapitate him, but Slade grabs the sword by its blade and shoves the handle through his mouth and out the back of his skull(awesome). He then endures explosions, kills some minions and endures more explosions. He collapses upon meeting a supposed ally. And wakes up 16 days later apparently completely rejuvenated in terms of youth.