The Leman Russ Demolisher is a force to be reckoned with! Strength 14 is an enormous advantage, and D6 damage is less of a downside when firing it into enemy vehicles. That said, I don't use demolisher cannons in my army, basically because I always roll low on the damage, hah!
Last game I played, this thing got destroyed by three Blood Angels smash captains. I tried to tell them it was the wrong edition for them, but they didn’t listen
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AFGixyKbMJU.htmlsi=RPkrxKDRJKgu3pyO It's covered in 4 different chapters of the tutorial. First is the mud effects, then washing in Agrax Earthshade, then two layers of dry brushing with Steel Legion Drab and Screaming Skull.
The only thing I don't like about the Demolisher is that it's so close in points to the Tank Commander. Just the idea of "Drive me closer I want to shoot my big cannon in their face!" is *very* appealing and hilarious. But... I feel like practically the order is better. At least for me. That said, in some reality there's a melee tank list starring 3 Demolishers and 3 Eradicators deliberately driving right into enemy blobs. It's not my list, but I'd love to see it just the same.
I am not a fan of the demolisher. It's cannon is way too swingy for the points cost. The eradicator however is fantastic. Strength 9 for the main gun is meh but it has the same ability AND it's points cost is 150. It's an absolute steal. I ran one down the throat of a unit of wraith guard. They weren't a fan.