hard to answer because your list of what you have is unclear but-
assuming you have the iso box inserted between amp head and dry cab properly, and are using the iso to provide a feed for your wet signal path,
dial in your dry cab volume first, set clean, the way you like it,
you take the line out from iso into your mxr chorus, which now creates your "wet" stereo split, in parallel/independent of your dry cab path. (i'd keep the wet rig to just the chorus at first, without additional delay units, to simply verify things are working, without too much noise or ground hum, and making sure you are not overdriving the chorus input with too high an iso box output level )
the outputs of your chorus should feed a separate stereo power amp
(or two amp heads, preferably into their fx loop RETURNS for clean power, but i have used main guitar inputs on amps set clean, OR two powered L/R speakers ala Tech 21 power engines)
the stereo power amp outputs (or amp heads) feed two individual LEFT and RIGHT speaker cabs
start with wet amp volumes low, then blend in the wet stereo chorus volumes to taste, listening for any clipping. this is why i suggest starting with a clean tone, because it's easier to hear clipping that way.
if using two amp heads/fx loop returns, sometimes the only volume control you have is the iso box level, or if the effect has an output level control
if all seems ok, add one delay to one side of the wet signal, after the chorus, and start with a low delay time and input level and slowly increase time and volume. if all is good, add second delay to other side. much better for troubleshooting than hooking all up at once and hoping for the best.
