All sources will be reference as nessary
Now then when calucation our old LOW end I did everything possible to neutuer the ISD incudling not counting any thing but HTLS firing and using twenty year old gun to do the firing.
Now then this time around where we will be trying to find the most LIKLEY and inculding all relvant factors to give a better idea of the most likley SW IS MK II fire and shielding power
Now then lets get going
Right first off is the old senarior we used to find low end calcs, the Moonshadow VS Direption fight which was anywhere between ten to thirty seconds long, on my low end I went with 10 seconds and said Five Vollys of course I was assuming worst case, Based on Human reaction times and what-not 18 seconds howver is more likley, upping our Total to 9 Vollys.
Now then we will be counting in those 25 MTLs we counted out the last time are to be inculded this time around and we are going to use acutal firepowers this go around
Based on ICS/Scaling and visual evidance the MTLs are most likely an improved version of the Acclimator Guns, How much we don't know and because I like nice even numbers we will be using 250 Giga-tons for MTLs
Alright 250 Gigatons on those guns as for Heavy Turbolasers we turn to scalling and visual evidence for this(TESB, ROTJ) and can place thier firepower at anywhere from 2.3332 Tera-tons to 29 Teratons, Taking the mean of this yeilds us with 17 or so but I'll be cutting it down to ten to give us a nice cleaner number
Now then so thats
Nine Salvos of 25 250GT MTL and 30 10TT HTLs
Right
25x250=6250+ (30x10,000)=306,250 or just over 306Tera-tons in One Volly
Right times nine
9X306,250=or 27,596,250 or rounded around 28 Penta-tons
Lets round it to a nice low 28,000 Tera-tons eh?

Makes it easier to undestand or to say it another way
27,596,250,000,000,000 Tons
So using most likley Figures there places us at Peta level shielding oor
some Sci-Fi Comparsions
The E-D assuming infintie Quantum torps(128 Megatons each)
27,596,250,000/128=215,595,703 torps and at 4 every two seconds(Divide by 2 get 2 a second)
215,595,703=107,797,851seconds/60=1796630 minutes/60=29942 hours/24=1247 days/7=178 weeks/52=3.47 YEARS
100 Defanits pumping out 8 per second Q-Torps agian or 4,000 Torps every second
215,595,703/4000=53,898 seconds/60=898minutes/60=14.97 Hours of Direct Hammering to take down a section of ISD shields by 100 Defanits
The Andromida Asendant Assuming those 100 Mega-ton Anti-ship missles
320 A second
27,596,250,000/100=275,962,500/320 a Second=862382 seconds/60=14373 minutes/60=239 hours/24=9.981 Days
The *Name omited AD crusiers able to pump out 1,600 a second
27,596,250,000/1,600=17247456 seconds/60 287460 minutes/60=47591 minutes/60=79 hours or just over three days
A Culture Worldship firing one salvo
ISD=Kaboom