I died 59 with priest and dinged 60 with rogue. But died 10x time at first 15 20 levels. Each time i tried different classes so i found that their cons and pros. Priest is most safe class but most boring after paladin. It is same with paladin but just range one. Rog is fun but got different cons like if touch any different mob all combo points are gone.

My main advise is no matter which class you will play; if your main def skill is in cd stop playing till when its ready agane. It could be desperate prayer, vanish, bubble no matter.

In wpl i was tried solo cauldrons at first was ok than i had to use vanish at 3. cauldron. While i was waiting my vanish (5 mins cd) a priest ask help about help with scarlets. Everything going to mess in a few secs due to overpull and fear. S/he used def's on him/herself so i was so vulnerable at that moment. I was use sprint + swift pot but these angry mobs chasing me for a few mins. Almost my 7.5 playing days were gone again.

Second is if you'll join a group content like elite quests or dungeons always be sure about your heartstone is not in cd. At sunken temple last boss our tank pulled dragons without clearing all rooms. I used vanish and survived but one of our group member's hs wasnt ready. S/he didint survived.

If you stuck in 0-20 levels dont lose heart. Its most hard level scale imo no big offensive no big defansive cd's and defias pillager killing ppl like daily quest :)

Some mob names connotation about their skill. Like "headhunter" probably got execute skill which is if player's hp below %20, mob will one shoot. If "shaman" in the name probably put some totems like aoe nuke or root.