You have to mainly focus on Strength and Dexterity.
Put dexterity point so that you will be able to use you weapon, then put the rest in strength.
You don't really need the other stat but be careful, some relic require a certain amount of those stat (Karma relic) in this case you have to keep some point and put them in the good attribute to use the relic.
Use the relic to balance the other stat in case you need more constitution or more essence to use you skill.
Try to find some defence clothes and dodge item to decrease the amount of damage you got from mobs.
You other goal will be to find a Vital Energies leech item. It's some kind of hat but those require a higher lvl. With that item you will be able to kill mobs without meditate.
As a healer don't forget to spend time to train you buff which will give you the missing attribute you need to be in peace

*Moved to guide section*