I would like to share some thoughts here – as I am pretty close to working on these and getting some free orders would really speed up the whole process.
So, the basic question is: which tank is best for getting the ace tanker?
Starting with something obvious: getting the ace-tanker-batch is based on experience (not like getting the MoE, which is different). After this, the mechanics are not so well known.
The documentation says, that you need to be in the top 1% of all players which played the tank in the last 7 days. In other words: take all the players who used the tank in the last 7 days, take their best battle during this time and this is what you have to compete with. If this was true, wargaming would have to collect und evaluate a lot of data… still it might be correct (it still might be some floating-average).
There are some hints, that there is some “reset” at midnight. Some posts state, that at some point before midnight someone got a first-class-batch and after midnight the ace-tanke with less XP… This can not be checked atm whether it is true or not. But it might help to play for the ace-tanker shortly after midnight (server time!).
What else is there…
If the above assumption about the calculation is correct, then you want to use a tank which is played by a lot of players, but only with very few battles per player (the math should be obvious).
So- which tanks are these? One that comes into my mind is the “Excalibur”, more and more players get it, want to try it, but play only a few games (Tier 7, so irrelevant, but you get the point). Also some “marathon”-tanks could be used just after the marathon ends. Or some time-limited-rental tanks.
Bad ideas are probably tanks which people have to grind through and only play it to reach the next tank, because they play a lot of battles in this tank in a short period of time and the best battle they have with it is much better on average.
Another thought: there are tanks which require a lot of xp to get all the modules and the next tank is not too hard xp-wise. Other tanks will have low xp-requirements for the modules and it takes a long time to get the next tank. What I want to say is: if you play a fully-equipped tank while most other players are using a stock-version most of the time, you have some advantage over the “average”. So Tier X and premium tanks might not be the best choice when trying to get an ace-tanker-badge.
Another bad choice might be the Batchat (Tier VIII scout), because there are so many successive tanks that most games with this tank will probably played non-stock and grinding these tanks, so people play lots of games in a row).
In other words: play a tank that is played stock by other players as often as possible.
IMO in grand battles some tanks have a clear advantage to perform better than in standard-randoms. For example scouts and spg. With spg in a grand battle you have much more targets to shoot at and higher potential for damage and higher possibility of getting the ace-tanker than in standard randoms. On the other hand TD might be worse in grand battles, because either your team wins and it is hard to chase the damage, or you teams loses, you get a lot of damage, but low xp as you don’t win the game.
So… assuming for scouts and spg you might want to increase your chances of ending up in grand battles, you need toplay Tier VIII or X. You also might want to play in busy times and maybe some servers have better chances to get you int grand battles? You also might want to disable encounter modes… I am not sure.
Also… wotreplay might be a good source to find out what the xp-value needed is for each tank… But I think it is more difficult than it seems at first.
One more point: maybe you should pick a tank which makes best use of improved equipment. IMO spg profits the most from it. For example a rammer gives you nearly full dpm-gain in an spg, while in other tanks you quite often don’t feel the shorter reload time that much – with arty you are very often just waiting for the reload, ready to shoot…
All things considered I would probably go for tier VIII spg with full improved equipment (because spg profits the most from it IMO), playing after midnight and trying to get into grand battles as often as possible. Also you might play in a platoon and ask your friends to shoot the tanks stunned by you first or coordinate your play in some way.
Any comments on this? Maybe tier X spg is better because chances for grand battles are higher?