Twiz
Волк Одиночка
BS 4K leaves you in BS so 66B would not be possible. Your only options are the ones Enk mentioned or BS 66KBut doesn't BS~4K, 2A+B [2] connect and wouldn't that be a better option since it does more consistent damage a can potoentially ring out? Also, sure you can't mash out a 66B BE instead of A+B, that would be a better lead to get more damage.
On a side note 1K 666B has some really good RO potential.