After assessing the level of his new subordinates Ren thought up ways to train them; but first he needed to train his strongest companions which were Lara and Hilda. That was going to be hard, seeing as he already taught Lara everything he knew about archery, which she was most suitable in. Even her ability to use Darkness magic was near his level. She even stopped using darkness magic, since the spells she could use consume a huge portion of her mana, making it an inefficient way to fight.
Hilda on the other hand, was a whole other problem. She was already used to her own style of fighting, and teaching her new ways might actually hinder her growth. All of Ren's' fighting styles were purely offensive, even the people in his visions were of the offensive type, but Hilda's style was more well rounded.
"Silika."
