The essence of the Tiger Ace
If you see a tiger ace, get snipers and AT guns/SU-85s immediately.
Snipers can not only spot, they also kill infantry, so if you kill all of his pioneers, he'll find that he can't repair his tiger ace, and it will be doomed.
Also, the SU-85 does outrange the tiger so retreating your SU-85 all the time tends to work.
The essence of the tiger ace is - if you don't win immediately, you lose the whole game. Snipers will end up bleeding you out on MP if you don't win in, say, 5 minutes.
The tiger ace is not alone, the tiger ace is free so for every SU85 you have on the field, there is a P4 for the Germans. Just "get snipers and AT guns/SU-85s" does not work, just to get one of each is 1000mp and 115 feul, which takes 5 minutes to get, more if you suffer losses and need to reinforce. It takes the German army a minute to waltz across a 1v1 map, kill your army and than proceed to kill your base.
The only way to kill the tiger ace is when you are a vastly superior player and have managed to cripple the German player before he can call in the tiger ace. There are no timings to exploit, no resource advantage to abuse. Either you already have 4 tanks and he has none, or you lose.
The essence of the tiger ace is that it has a broken design. You can't have a balanced game where one player needs to destroy the other player before 7CP or lose because of a free call-in. Other heavy tanks are balanced by the fact that you need to save up a lot of resources before you can call them in, which gives an equally skilled opponent something to exploit. The tiger ace does not.