I was looking a little at E/Me skills on the wiki and something in particular caught my eye - rather significantly.

Mesmer - Mantra of Earth : reduces earth damage taken (40-50%~) and gives 2 energy when hit
Elementalist - Stone Striker : all damage you take or deal is earth property
Elementalist - Stoneflesh Aura : reduces damage 25 (or 33 with 16 earth) and immune to crits

Of course, not much for healing, but as long as those enchantments dont poof i cant see that character dying.