Originally Posted by grishnak
All the maps have quality's that favor particular vehicles over others,you just have to adjust as best you can to circumstance.At least two of the maps are really crappy for arty players.It would be good if you could have foreknowledge of the comeing map to chose the best vehicle and equipment load-out,perhaps in the future.If the map is bad find somewhere to lurk.
All the maps favor heavy tanks and big guns. Large HE rounds are very effective against most tanks too.
As for the maps:
Almost all have 3 or less lines of approach forcing head-on fights between the two sides.
Most include substantial urban areas turning things into a street fight at short range.
Anywhere from 20 to 60%+ of a map is unplayable terrain. This further limits the ability to maneuver.
On some maps artillery can be very effective, on others it is all but worthless. It's a crap shoot as to what map you end up on.
A few maps favor an alternate strategy. For example two of the tier 2 maps are well suited to long range sniping. These are exceptions to the rule which tends to be head on battles on a narrow frontage with next to zero room to maneuver. That favors heavy armor and big guns.
"One shot" guns are clearly a better choice to long range accuracy, a small gun with higher RoF and good penetration.
For example, the KV II with a 152mm howitzer is favored heavily over a KV with a 76, 85 or 122mm gun. The 152 will "one shot" most vehicles. Even those it doesn't instantly kill will be badly damaged and suffer multiple critical hits from it. This is because of the way the HE algorithm is currently set.
The 122 howitzer is better than the 76 or 85 in the same fashion. Many German mediums use the 105mm howitzer, as do many US tanks, instead of the 75 or 76mm AT guns for the same reason.
The best strategy on most maps for players using light or medium tanks is to play cautiously and let the heavies engage the enemy first. Scouting with lights is useful but generally means you die doing it.
Mediums have to fight in groups and almost always will require a heavy or two to attract fire before they engage. Otherwise, they tend to just be poorly armored targets that die.
TD's can snipe on some maps if you know where the spots are and you have worked on camouflage and spotting to maximize those. You need a really powerful gun in anything over about Tier 5 to be viable doing this. But, this requires luck on your part to remain unspotted and not under return fire. It also requires your team's players to cooperate in spotting targets for you.
Remember, it is a game not a simulation. What works in the real world often doesn't in the game. If it did then the most popular tanks wouldn't often be the collection of failed prototypes, one-off's, and limited production failures that are.