I don't agree that a Leman Russ should be over 200. With BS 4+ and not a great deal of real offensive power (those side sponsons add cost and even that double shooting turret weapon will only average 3-4 hits on a battlecannon shot with double shooting).
A Battlewagon has good melee and great transport capacity on a more durable chassis for only 172-190.
I mean based on new points costs for vehicles and for some reason I recall a russ costing about 170 ish points maybe 155 ish, and with vehicles costing more I would have expected a 30 to 50 point increase in cost before they buy their weapons some of which I would expect to have a 0 point cost.
I'm not saying that they should cost anything, just that was what I had expected.
As for the cost of our artillery. It is what it is. If you don't have any you'll just have to look for some other option. What ever that is.
I'd be fine tailoring a list to beat them if they come on two strong and it's no fun for me after I've had a few tries against them. I wont be a punching bag for the other player. If after I use my tailored list it's too much for them I'll ease off a bit. It all depends on who the other player is.
But then I prefer a draw to a win or loss.