Took me a while but figured this out....UO Stratics barding calc doesnt recognize "Para" Cu's (if you go to the paragon page, cushide isnt listed and it'll continue to show a normal cu w/ barding diff of 126......paragon cu's are 160).
Here is my experience.....at 120 music/peace/prov/disco........you can successfully provoke a regular cushide onto a paragon cu, but not vice versa. If you Disco the paragon cushide, then you can successfully target it as the first......and can even get 2 paragon cu's to fight; ive done it a million times.
Someone else that is better w/ numbers or that has successfully lored a disco'd para can perhaps supply what the 'discod' barding difficulty is....i think its like 152...ie unless you have 120 disco, you will still get a barding dif of 160 because it only looses 14% and not 28% of its skills. Even at 120 provoke, you'll fail on 2 disco'd para cus a LOT, but eventually they'll fight.