To Cast Spells that can auto-track a target in a certain range, you either need an extremely talented mage or several mages to work together.
(Of course, people at Rank S or above can cast it without any problems.)
'They most likely don't have A-ranked mages... that warrior Orc and that guy Xagok, only those two might have been A-rankers in their team...' (Rio)
While looking at the massive amount of lava pouring down from the sky, Rio thought:
'hmm, which one do I use now… thunder spread?' (Rio)
Rio certainly can defend against precise and strong strikes, but when it comes to liquidized attacks like 'lava' etc. It's quite difficult to do so.
[Divine Spirit's Blessing: Divine ascent!]