I know there is no easy solution, thats why I didnt come up with five new ideas on how to "fix" this.

It was merely tossed up here for a discussion, as I feel it impacted me quite alot. And yes - I've been raiding the outlanders, where a druid and a ranger could heal the ranger faster, than I could do damage to it, as a hero healer. (to be fair, there could have been another one there out of my range, but all in all I feel rangers/druids/paladins have better options now healing the guards.

Perhaps a solution could be, if the npc was in combat x ticks ago, it cannot be healed. Then it would be some kind of "timer" to get the raid done as quickly as possible.