Walker knew that Su was already analyzing the skills and trying to see how they would fit within their partys' team work and strategy. "The thrown blades will be invaluable against large opponents. You can hide behind my shields and attack without leaving my protection." This was the most important part of the skills she had seen Walke use.
"I agree, it will be a good strategy to save mana and also deal constant attacks while Remey and Midnight get in to position and Gil is preparing another arrow." Walker also saw hope it would keep the focus of an opponent while his party prepared their own attacks.
"There will also be the benefit of the light thrown blade bleeding away mana. That will hugely weaken a monster." Walker wanted to focus on using the light thrown blade over the darkness thrown blade. It was mostly the aversion to the decaying effect that he had seen plague the forest.