Talk me in to a T30

I don't really like it. I mean Its alight, All things considered. But I don't think your missing anything skipping it.
The guns kinda derpy so you have to play second line, Its hefty and not very mobile, and while the turret appears strong its not very spectacular at tier 9, and rotates slower than speed at which Pluto orbits the sun. Its also very vulnerable to arty.
If you can find a nice place to hull down and/or people leave you alone, or you become proficient at "peek a booing" using a hill and to a lesser extent buildings and are arty safe. It can pull massive games. Its also good a bullying lower tiers, Particularly 7's where its hull armor isn't completely terrible.

 That's about all its good for, Doesn't do much else other TD's can't do, and hell some can do some, if not all of the things it can do better.