@coldreactive Your HP is low for SH but just on average for level 55 range. You may want to use a weapon's barrier as a placeholder for now until you get the last piece of Brissa for more HP as weapon's barrier is balanced for survivability with +150 HP from the base and affix with decent increase of damage resistances.
Most trash mobs won't two shot you, seeing as the screenshot showing that you are using Te, which means access to deband and enhanced deband if skill points are put on it, which dramatically cuts down damage you take.
Generally, if you find yourself getting hit often, use a weapon's barrier or maybe Diabo's for more HP. While attack makes things die faster, it won't do you any good if you get hit often and go splat.
@SonoVulpin For level 55 that's around the range you should have and also they are using a leg piece that doesn't offer much. If you put in a weapon's barrier, their HP will shoot up to 739 HP or around there granted that leg piece has no stamina or HP affix.