Hi,
The requirements for the Shallya's blessing "Cure Wounds" are :
"6 favour. If you are engaged with an enemy, add a purple dice to your dice pool."
Based on the other healing blessings and the picture on the card, I would say that an "engaged with target" requirement is missing... But maybe it's really designed as a long range healing spell.
Would you impose some range limit for "Cure Wounds" ?