Before rank. Can you add "Toaru" to the tags? To Aru and Toaru have both been used for romanizations of the show.
If you want to avoid the 'To aru' and "Toaru" conflicts. Why not just use "とある科学の超電磁砲S" as the source. If not, then consider adding it to the tags as Japanese people play this game and do use the searching this way.