They should not only be skilled in grinding out scenarios but also in knowing as many templates and versions as possible. Because most of those who are currently in the AK cannot be called experts in several templates. For example, Yavdet and possibly Peterius in 8mm. Similarly, if we were to name experts in VT from the AK, I can't imagine (or rather, I highly doubt) how accurately Dubrovin could assess, for example, which side has the advantage in a game situation on the same 8x12 map in VT if players from the AK were to ask him to give a verdict on the winner.