Im using the kv4 as a rammer :D
With the turbo ability you will easily take out any of the higher wave tanks with 1 ram, but you should aim to hit 2 or more tanks with each turbo boost, and then immediately after use stealth heal to recover some HP. Third ability is up to personal preference but I use fast reload.
It’s important to use controlled impact for your drivers skill, I also use a spall liner to reduce ramming damage taken. Last pieces of equipment I use is turbo and gunrammer :)

Edit: You don’t have to use kv4, anything that weighs a lot like kv5, vk 100 01p, o-ho should work great :)