It's rather annoying to have to watch each of my casters to make sure that their various skills go off; it'd be nice if I could queue up 2 or 3 spells in a row to make sure that a nice combination goes through while I focus on microing my front line. Is there any way to do this?
There sure is!
Hold down the Shift while selecting actions to queue them in order. This also works with movement, and even works in exploration mode to set waypoints, or to disarm multiple traps in a set order! No more fighting with bad pathfinding! (Maybe. If you remember to set movement this way every time.)