A-Trac is a must for our IFS

Lift has nothing to do with Atrac. Tire size might.

 

When you lift Toyota IFS you are essentially trading some available down travel for ground clearance.
The only exception to this is using top hat coil spacers.

ATRAC still works the same. But you're on the right track...
Because a typical lift will reduce available down travel, you'd be more likely to lift a front wheel off of the ground. Which theoretically would make ATRAC have to engage more often.

More simply put: No, ATRAC works the same. You'll just be more likely to lift a wheel if you've reduced available down travel.