Just realized but hasn't the Kratos become pretty good?
It's Stable so it always counts as stationary and it can fire all guns to any target without having to do snapshots
It has Melta 24, with 8" movement so that's D8 at 32"
It's now AV14 all around
It has twice the HP of other tanks
It seems pretty decent as an antitank platform
Please don't compare to rapiers, they are made of paper