There is no universal self-healing in Heroic. Potions are not a viable alternative...they're not boostable by Pos SP, primarily. Vendor ones don't heal for nearly enough by late Heroic, and Silver Flame pots aren't available to everyone. Scroll healing requires fully investing in UMD, which again locks out certain players/builds and forces you to build for Heroic in a way you might not want to for Epic.
Its that dichotomy - the fact that an option for minimally adequate universal self healing just *doesn't exist* in Heroic, though it does in Epic - that I was trying to address.