And I think that those 80 focus are misleading. It's not about the focus you have it's about what will have to be refreshed/comes off cooldown shortly after the LnL. You will starve (i.e. delay the next ES) if you use KC during LnL, ES directly after and BA shortly after LnL no matter how much focus you have. It would be very nice if someone would math this out (and I'd be glad if I was wrong).