With this trait it may be possible without the paladin. Plus, if they do stack it'd be possible to stagger them so you get 40% almost constantly. Plus the 25% from, death strike shields, hovering around that would heal up pretty quickly i'd imagine, especially at higher gear levels. Plus, at that point extra DPS converts into healing. Maybe with this build they'll become as good as 5 paladins.

Plus the bloodworms buff and normal death strike usage could provide more healing and mitigation. Toss in Prydaz and the Vampiric Blood Belt and the corresponding talent and you have all the heal, heals for days, house of heals.