Toz's idea that would hopefully solve his problem of not being able to condense his mana quickly enough stemmed from the thought that if he couldn't apply enough pressure on his own, he could use an outside influence. However, that was where the foolishness of the idea came in. Since Toz's body was immobilized by the mana surging through it, and because there was a limit to how much he could interfere with what was happening to his body, there was only one outside influence he could rope in to help him.
The mana storm, and more specifically, the rushing avalanche of mana, eagerly pushing its way into and through Toz's body so it could enter his mana pool. After Toz managed to get his mana pool back under his control, he had also been able to balance the influx of mana somewhat and restrain it. But he had already done as much as he could on that end. He couldn't do any more without risking his body exploding.