Keep your other tools.
Tiger Testing will not replace the 1/2 day engineering interview.
But those mock programming assignments are time intensive for your team.. and how many candidates have failed them? More than 90%?
Tiger Testing will save you time by narrowing your candidate pool -- eliminating 50% of the in-person engineering interviews that candidates would have failed anyways.
More advanced testing platforms are expensive and usually have a candidate limit... Tiger Testing is a cost efficient way to optimize those resources.