Survival
Under normal circumstances, the field of vision is entirely adequate, but for someone like Code 19 moving at high speeds, obstacles that wouldn't normally pose a threat become potentially fatal hazards.
Thus, the usual breadth of vision is simply not sufficient.
The best approach would likely involve integrating mana sensing, hearing, touch, and vision to form a comprehensive image directly in the brain.
This is a skill enhancement magi must master to advance to higher levels.
At this juncture, the second utility of the seemingly insignificant spell Mist Wall becomes apparent.
It can disrupt mana sensing within its range of mana mist.
Although this interference does not discriminate between friend and foe, it's clear that for an enhancement magus, such disruption is decidedly more lethal.