for me its best to not rely on enchantments there because the enemies got a monster skill that very heavily removes enches in a non predictable randomness.
this bar has a lot of regen(non ench) from 7th and 6th skill. u can remove all 4 secs one or more conditions. u can heal urself with 8th skill. u got a lot of Max Hp because of second and 7th skill.
u don't need to atack to get adrenaline. just use the Second skill two times and the 4th skill is active. Also Ranger has a nice armor set and u can skill the shield. ( i recommend a 10vs pierc or 10vs flames with a 60hp hex mod and same with a 30hp as second set)
edit. For heros i would get at least one ineptitude mesmer in because the melee enemies at start are super strong. so i include 1 anti melee focused mesmer on my team comb.