QUOTE(Vigilant @ Aug 18 2015, 11:02 PM)
I don't really get the double lushen thing actually as I own a lushen with 180-ish CD. For me it's best to RNG katarina with lushen with lushen move first since lushen amp magic burst damage multiplier isnt as good as katarina burst 2x on a single target (3rd skill has 3 hits).
So why double lushen is OP? Unless 200~220 CD maybe?
Using Katarina will make your targets more random. Result may be better but there is still element of uncertainty (e.g. 3 shots hitting all same target, and if so, your the other lushen might not be able to kill the other 3 mobs with a single amputation).
Double lushen aka double amputation will deals approximately 45-50k-ish (if not more) dmg to all mobs regardless of defense (except fire mobs which may not crit). That is assuming 7-8k per card in each of the amputation.
My lushens provide that kinda output with Crit dmg of around 180% only, after sieq's buff of course.
Normally, if AD is chloe + another other 3 non-fire mob. Just go chloe shield, sieq buff, delay amputation by one round so that their chloe invincibility wears off, and proceed with double amputation. By then, if chloe is not dead (most probably), your sieq can finish the job.
If the other 3 mob is water based dps (say camilia/theomars), then you might want to swap your sieq for Aquila. That way they wont potentially target your sieq and shld go for your tankier chloe. Of course, theomars might just go for any target..
Enjoy your double lushens. The trick is when to know you can double lushen and assess the risk accordingly. =)
I normally opt for double lushen because that is the fastest way to burn my arena invites. If want stability, then go with your typical core/sustain team. =)