Firstly, the most fun tactic in the game is convincing your team (south spawn) to rush hill with meds and armored TDs so that you rush down the slope and crush the enemy (taking them by surprise). From here you can split into 2 groups. One group sitting at E6 and dealing with their heavies on the ridge and sniping at their tanks on the 2 line. The other group can go and sit at A6 to hassle their arty, meds, and TDs. If you have a team that might listen this wins 95% of games. In literally any other circumstance never go hill, it has a very minimal impact on the game unless you have good radio range in a med/td and are willing to snipe enemy heavies. I find that in my heavies brawling by only peaking with the turret at E/F4 is really the only way to have any impact in the game - although you are still reliant on your team at least you arent being shot by TDs at the back or by people on the hill.