Special items effects

for new people or people who don't understand their are items that give special effect such as reduce delay or add certain class damage. This is A dummy guide on how its calculated and what it does
So first off is the Crystal ball which gives 75 magic damage
to calculate the new damage of your magic weapon do X x 1.75 
an example of this would be 30 x 1.75 which will equal 52.5 basic calculator work
Next is the Magic harp which reduce delay by 25 
to calculate delay is different from magic or any type of damage but still easy work
the equation is 1 - .x (x being the delay) so magic harp will be .75
now multiply that times the delay number (ex) 5 x .75 and you get 3.75 still easy calculator work
Finally I do hunter armor that has a negative spread of 20
Now I do spread since magic range and melee damage is the same equation
to calculate negative is still pretty easy their is two ways of doing it but I'm going to show one
 the equation is (1+.x) (x being spread) then multiplying by the current spread then subtracting
A example of this would be (1.20) x (3) = 3.6 then minus it from the first delay of 3 which will equal (2.6)
Well I'm pretty tired and this page probably needs some improvement but I did a bunch of test so this should be about 85% accurate at most. but before I go I just want to remind this might be calculated separately from your other gear or whatever you call it