It's just a confused system. At the time I was playing an ele and the self heals were ridiculous, as well as some group heals. Super easy to make everything a combo and just roll to heal for free. I am sure it has changed but I still hate their archetypless system and how games like GW2 perpetuate that trend now. There is nothing wrong with a class having things it can't excel in or do at all, that's what other people playing different classes are for.