How thorns (dual blader) works

For hero the way i did was right. It is multiplied in the end. Even Dusk's DPS excel spreadsheet has it the same way i do. Multipliers like combo, berzerk, shadow partner, bullseye, etc all multiply at the end.

No, you're wrong and Dusk's calculator is wrong. Aside from the testing that was just done in the Formula Compilation thread, I've tested this myself. And I've adjusted my own version of Dusk's calculator to match it. All the other things you mentioned *do* multiply at the end, Combo is just an exception.

NL range is max range but then i multiplied it by 0.75 to make it average range. For Corsair i multiplied by 0.77 for them since they have more mastery. I used the spreadsheets from this forum somewhere in corsair page where there is an accurate formulad spreadsheet where you plug in the equips stats and you get the range. So its all accurate and same equips for NLs. Only the weapons are different and some others instead of DEX/STR its LUK for NL, etc etc. So yeah the ranges are fine. There might be a small difference but its negligeable.

Sounds kind of messy. I used my version of Dusk's calc so I know they used the same stuff, I just find it odd that our ranges are so different.

There is no way SE and Thorns will stack b/c thats just messed up. You can test it out in KMST, im sure it wont stack.

You're just speculating -- you don't know that for sure. And being that crit rings are even coming out, it's pretty clear the current designers have no idea how crit affects classes and class balance, so I certainly wouldn't put it past them. I'm expecting Thorns to take up the innate crit slot (if it's not already filled), and SE to stack with it like how it stacks with innate crit.