For alliance13 the requirements change from "being top3 in 5 games in a row" to "being top3 in 3 games in a row". Right now I managed to have 3 in a row. What is goint to happen with the update? Will I complete the mission then or will the progress be reset? In the first case, I will try to get 5/5 before the patch, in the latter case I will just pause the mission and wait for the patch. IMO after the patch the progress should be taken into account and the mission should be accomplished, but who knows?
Tank used: Progetto 65 Use a tank that you usually know that you do alot of dmg with. The key to this mission is to stay alive as long as possible and just let your gun sing. I think its easier to do this in a T10 tank just because if you get bottom tier, if you try other tiers, then you will most likely struggle to get the highest dmg. I would also turn off Grandbattles for this one, I think thoose are great for mission normaly but not in this case. Best of luck to you all