Roy had already confirmed one thing—Trag'Oul had a natural home field advantage in his dream.
This was probably why he had pulled Roy into his dream. Under these dream conditions, Roy was still at a loss on how to attack Trag'Oul and cause him damage. His ability to fight back was very limited.
If he continuously gave Trag'Oul 'knowledge' just so he could create some conditions for him to fight back, it wouldn't be worth it. Not only was it unknown how effective it would be, but it would undoubtedly increase Trag'Oul's strength.
Therefore, the first thing Roy thought of was not to fight Trag'Oul in this dream. It was meaningless.
