I'd agree that you are lacking in calcium and sulfate for an IPA, but the biggest problem is the alkalinity.
I'd start by diluting your water with RO water using about 4 parts RO water to 1 part Dope water.
Plug this into the Ez water spreadsheet (80% dilution rate), and then start adding CaCl until you get your Cl level up to about 30 ppm
Then start adding gypsum until you get 100 ppm Ca and 200 ppm SO4.
(The 30, 100 and 200 ppm figures are approximations made by Terry Foster (Pale Ales), but I have found them to be very useful.
I never bother with epsom salts, as (according to George Fix), malt has enough magnesium for brewing purposes, but if you find it is easier to reach the Ca and SO4 concentrations with epsom salts, by all means use them; but don't exceed the maximum Mg concentration shown in the spreadsheet.
There are only 10 types of people in this world. Those that understand binary, and those that don't.