[Wei Wuxian feels that cool analysis again, much rapider this time. it apparently ends in the decision that it's not a good idea for him to try to play music at the same time as he's acting as the instrument Wei Wuxian is using to do his own thing, unless it's really necessary - he summons his sword from its sheath with the barest effort of willpower and sends it at them to keep them back with a sweep.

pulls Wei Wuxian closer, letting him lean harder on his own will and focus for a moment, and arrows towards the skulls fast]