I agree, the min unit of AKs and max flamers is good. I have used them to escort Strakov. They are great at clearing out trenchers. The brutal charge is nice but do not expect it to get much done to jacks.
I don't really like cav with strakov, they already have e relentless charge and out threat strakov feat. I think they are an expensive unit and he does nothing to help deliver them aside from occultation which isn't exactly needed.