I am very aware of that, yet with your suggestion you could very well end up with ES refunding focus back and AS refunding focus back, on top of your natural focus flow, you end up focus caping.
Another possible scenario is that you use KC hoping for a ToTH procc but it doesnÂ´t happen, and you end either waiting for the last ExS or firing a CoS to regain focus. The only scenerario where I would use KC is when above 85-90 focus. Anyway in that case I would go for ExS-AS-AS-ExS-AS-ExS, delaying the second Explosive shot.
what I donÂ´t know is if delaying it several times may result in a DPS loss.
Asuming a fight like H ultraxion, where you fire 14 BA (the 15 one would occur in the second 360 of the fight at the very least) and you get 14 LnL proccs, you would end delaying ExS for 1 sec 14 times (that is on the very worst case, when you are always very high on focus when LnL proccs) that means you are pushing 2 ExS (and a third of ExS) out of your shot breakdown, and you gain 14 AS + (14 AS - 14KC). LetÂ´s be very forgiving and asume you end up pushing 3 ExS off.
The average explosive shot damage for my character is 56664 per cast.
the average AS is 24682
the average KC is 25592
3 x 56664 = 169992 damage lost when not firing 3 ExS
24682x14 - 25592x14 = -12740 damage lost (KC does less damage but has a higher crit chance)
24682x14 = 345548 damage won from the 14 extra AS
345548 - 12740 - 169992 = 162816 damage won.
This is pretty rough math and IÂ´m sure it can be wrong, but for what it seems, delaying ExS for an extra AS every time this happens is a dps gain over KC. That doesnÂ´t take into account Sic'em proccs and TotH proccs, which would favour AS over KC again.