I think you mixed up the two lightning spells Aneirin has.<br/><br/>There is<strong>Forked Lightning</strong>the Fireball clone, level 3, area effect, auto hits everything in the area but allows a REF safe for half the damage.<br/><br/>And then there is<strong>Lightning Arc</strong>, the (modified) Scorching Ray clone, level 2, single target, requires a ranged touch attack but allows no halfing the damage via saving throw. The empowered version then is (thanks to her Magical Lineage trait) a level 3 spell.<br/><br/>It is the latter one that Aneirin has exclusively been using throughout this encounter.<br/><br/>P.S: And even if Aneirin had used Forked Lightning she would still have had the option to center it around K19, which, since the spell has a 20 foot radius, would hit the beast but neither Seraph nor Amber. But then it would have been my duty to be more precise in my OOC description at least about where exactly she is aiming at.