I have actually given a lot of thought to this, and have some serious opinions on the matter. You can tell I'm serious because I'm using dark grey, not
blue
.
One of my characters has taken his lunar magic training and warped it into a series of insane, potentially overpowered combat spells. My personal favorite is the humidify spell.
As you know, in game the humidify spell fills any empty vessel in your inventory (presumably in your hand or at least your possession) with water.
I ask you this: what happens if you place your hand over someone's chest, say, over their lung, and cast humidify.
This raises many points on the uses of non-combative magic in a combative setting.
Would that spell instantly drown the poor fool? Would it do nothing at all? Would it instead fill their chest cavity or clothing with water? Who knows. We don't. As such, its open to great interpretation.
I've worked out some rather strange combat uses for many of the lunar spells, as the twisting of these peaceful, druidesc spells was always something of interest to me even before I started role playing.
But yes, the truth of the matter is that we have literally no idea how these spells, and many other non-combat spells, would function in a fight. And we can't just ask Jagex. Well I mean we can, but really, are they going to take the time to answer that?