I have posted about this and have seen posts about it but I want to keep the topic alive in hope someone at SD sees it.
I love playing as a heavy which im sure in a parkour type game means im in the minority, so I would like some help.
My guy dies too easily, thats it. If I try to kill am AI heavy its a struggle but im going down like a sack of s***.
Also I think my gatling gun should do more damage aswell considering its rate of fire compared to the other heavy guns.

Although this is normally a problem in AI games, have you attempted to have your character boosted with kevlar, damage and health?, they are pretty insane at defence this way

It's just the enemy AI getting ramped up to Eleven. Yeah sure you were almost a juggernaut up until Rank 4 but now your name is Baldur and the enemy is shooting bullets made from mistletoe. Thankfully it's still just as difficult for a human character to kill you as it used to be.

Go soldier. You can get Kevlar, Armor piercing rounds, gernade cooldown improved, gernade damage increased (can kill lights with just 1), and gernade range increased. My friend uses this in our battles against each other and he is a pain to kill. Oh, and try using the Maximus. A lot better. Get it buffed by an engineer and you are tank.