Don't use Cure II until the Freecure is up, unless it's an emergency.
It takes a lot of MP. Freecure give 15% chance of Cure II being a no-cost. Says you're 31 so Freecure is level 32.
Having Regen later helps. You get that at level 35.
If you keep on dying, I dunno perhaps the tank and other DPS won't turn around and halpz. That's how I die most of the time lol