This is great, Dark!
Another weak point on the Scorpion can be taken advantage of if you are a sniper. If you have a good vantage point you can scope the top of the Scorpion. You should be able to see a small amount of the driver's armor color in the lid just above the driver's seat. Shoot at the armor, while sometimes it take two shots to pop off the top, it usually only takes one if done correctly. Then you just snipe the driver in the head. This can give you more sniping chances as well, since the enemy team will keep piling into the driver's seat while you are continually sniping them out. You could also shout out to teammates that the Scorpion is open for grabs, but I would not suggest this as they would be open to snipers as well.
*Edit*
I am a tard. Sorry, Dark. I did not see that you had already included this information in your main post! I must have read over that part...