I don't do any of the MyTwitFacePage stuff, but I'd aver that RPGs are fine. Tank vs. Tank is fine. Mines are NOT fine!
First, you are given waaaaaaay too many. Three should be the max per person. Period. Second, they don't disappear after a kill. Pretty lame that a guy lays down mines that kill someone 5 deaths later. Third, they do entirely too much damage. 50% is fine for running over one dead-on, but the ansillary damage from the second or third shouldn't be equal. Mines are the very bane of my BF3 existence.
I rarely get killed my rockets...unless I run into a team that has obviously decided to go entirely Engineer class and go on a tank hunt. I can typically kill about 5-6 enemies before dying if I'm completely surrounded by a 5-6 rocket-launching hoarde. (It's the second wave of respawn-on-team-members that end up killing me.)
Tank vs. Tank (not IFV or other vehicles) is only an issue if I run into the rare "glitch?" where someone, somehow kills me with one shot, even with 100% health. I've never, ever, EVER had this work in my favor. It's rare, but it's happened.
I do have "some"
experience...2,300 tank kills so far!