As mentioned last week, Shattered Pixel Dungeon's upcoming Cleric hero has a variety of unique spells which they can access via their holy tome. The first of the Cleric's spells is a simple supportive ranged option: Guiding Light.
Guiding Light is an innate spell (no talent needed to unlock) and does some damage while 'illuminating' the target. This guarantees that the next physical attack made against that target will hit.
(Image Description: a short GIF showing off the guiding light spell. The Cleric casts it on an enemy, which begins to glow. The Cleric then waits for the enemy to approach, and attacks them.)
Yeah Mangband is a good example of why I don't think this would work for Shattered.
If there's ever any sort of mutliplayer it would probably be more minimal or asymmetric, such as two players playing separate games of the same dungeon, but are able to pass items to each other.
That could be cool as a sort of competition, players would have to balance speeding ahead of the other player to find better items with not getting so far ahead that the mobs are too strong for them to handle.