form my experience with tiger ace,
the key is to stall it for 5 mins not losing too much, the tank worth approximately 5 minutes of income, so after that time you will begin to gain over your rival.
i preferably like to have multiple units to haras it same time. a mix of mobile 2 t34 on the flanks so it won't rush forward, 2 su 85s in the front to nip it, 2 zis guns spread out 30 degrees of it on each side, and a heavy tank like is2 to soak his damage for 2/3 shots.
i play mostly 2v2s so if my ally supplement my unit composition it is possible.
i never attempt to ram it unless from the rear, i never attempt to flank it, just constantly nip at it, you will lower its health by small bits each shot, and he will have trouble killing anything because you just back off with damaged units. he might rush the su85s and kill them if he wills but he'll need to back up afterwards.
this strat won't kill it but stall the ace
it is also a question of the game state, when tiger ace is called the caller gets estimate of +40 popcap worth of units instantly.(assuming you have the correct unit composition to counter what ever on the field ATM + a bit invested in prepping for the tiger)
i think that if he over runes you by more then 100% you will not survive even if you have the right units.
forexample, if you both have 60, you rival will jump to having 100 popcap worth of units that's less then 100% compared to you so you can survive. if you both have 40 popcap your rival jumps to 80, that is twice more and you will lose no matter which units you are having or going to build.
that's why i advocate for increasing the tiger ace popcap to 50/40, so it will be a last resort unit a german player can call while having small army, instead of a nail in a coffin that he can smack you with while having a large army himself preventing any chance of a comeback.
I don't understand what you mean about this? Stalling it for 5 minutes won't do anything. You need to kill the damn thing to win?!
Besides, have you calculated the time-cost of all the units you mention in that counter? It must be way past the income of 5 minutes.
Besides not liking what the Ace does to the game, I think the decisive factor here is not the actual counter built after it arrives. It's about having perpared counters BEFORE it arrives. Like mines (as if you have the time to lay an elaborate system of mines during end-game...)
And that's the real bitch. Improvised, massed building of any standard AT is not going to do it. You have to have the stuff in advance.