M8's are very hard to see in any cover. Very small profile with anything that keeps the profile from breaking the visible horizon. I have had both Mano and Tyfoo pepper away at me and when I finally do spot them i'm tracked, turreted or engine out. Their M8 has been in a wide open grassy area where you'd think it would be easy to spot them. But if there is any foliage even a few hundred yards behind them it keeps their profile out of the skyline and their M8 blends into the grass colorwise quite well. As far as killing T34/85s, you have to hit them right with a pretty heavy shell 76mm or bigger. Lower chin where the plate slopes up or side turret base are good spots. The Firefly is a good 1 shot killer of that beast, but don't miss that first shot. The fun part is seeing them first, good cover is key. I was Infantry, but you stick to cover, fight from cover when you can. If caught in the open, had to get to cover because your fatigue buttons always felt like they were holding you too high off the ground.