Lelith's 'A league apart' rule grants extra attacks based on the difference between her
WS of 9 and the highest
WS enemy in combat with her, because she's 'just that good

'
Pg 49
DE codex.
What would happen if she was against something with a
WS of 10, such as a Bloodthirster or Avatar?
RAW it would seem to grant her +1 attack, as there is a 1 pt difference, but could it also be argued as -1 attack as the enemy is better than her?
Our houserule is that she gets the extra attack, due to finally finding something better than her and putting in a little extra effort
I'd value other people's views on this though