Unless you do some major modifying or you have some aftermarket steering system you can't adjust the ackerman on an E-Maxx. The draglink is a solid flat bar stock.

Moving the shocks to the outer hole will give you more sidebite but not more steering. It will also make the truck less forgiving over rough sections and tend to be a bit twitchy.

Increasing rear toe-in will help make the truck turn quicker but don't over do it. Also makes it a bit more stable under hard accelleration.

Increasing front camber will lose you straightline traction due to the unequal length swingarms. As the truck transfers weight to the rear under accelleration the nose raises, which increases the camber considerably which reduces the contact patch of the front tires with accellerating.

Usually the truck understeers in corners when on throttle. Usually because the inside front tire is lifting and unloading. Then the outside front wheel stop's pulling and becomes dead weight to be pushed through the turn. Tapping the brakes sets the inside front back down but you lose forward momentum.

Better solution is to run the rear shocks with heavier oil for more pack to keep more weight from transfering to the rear. And a rear sway bar helps if the track is fairly smooth and even with a lot of bite.