Board Thread:General Discussion/@comment-25913728-20150218225404/@comment-24927326-20150220203907

Bai Suzhen is a better single-target damange on bosses than Black Knight simply because BK does dark damage. Black Knight may be more useful in normal fights because you can use his skill very quickly to avoid taking extra hits. On the other hand, BK has a much better support skill. Bai Suzhen's support skill is awful since critical only gives +20% damage, so 50% higher change for crit averages to a 10% damage increase, which is nothing compared to BK's 35%.

Siegfried is probably still the best single-target hitter in my opinion, since he has higher attack than Bai Suzhen, and his skill is more efficient (35 SP for 2x vs. 40 SP for 2.2x). He does have lower HP, which can be a problem.