Formula is easy.. not all your Attacks add same damage
Basically add the high + low of your FF (pre CA+ mods_ divide by 2 and thats its base for simplicity sake lets say 1000-1200 = 1100 now get multiplied by CA's
Pinpoint/Jugular/Mortal/Execute each ad a 1 multiplier to that formula. The blues add a mult. of 1.5 and 2 so mult is cast time multiplied... the more the Stealth CA takes the more dmg it adds to FF
so max ATM is a 8.5 multiplier on our theoretical 1100 FF version yields a hit of 9350.... (no high or low..its allways median....ALLWAYS only thing that changes this is debuffs) add 30% for crit and u get 12,155 crit with max CA's
Basically:
If moonblade would add it would be a 9.5 mult and do max
10,450 noncrit ---------13,585 crit
your 2 min combo would be (what we max out right now with 10 min combo

)
9,350 noncrit -------12,155 crit
your 1 min combo
8,250 Noncrit -------10,725 crit
What really pisses me off sometimes is that what really adds damage is what we most get interrupted in concealment combo haha... before i would kinda get mad when mob would ae before blues...
Currently Moon Blade has a multiplier of 0 and FYI no other CA's add dmg although they bug FF to seem like its active (you get a 100% miss if you use em alone and FF) for those noobcakes thinking adding Cheapshot/Evade adds dmg...betcha you were the same who thought Smokebomb did uber dmg