I use a main Str, secondary Int hybrid, and I don't use the disables reliant on Int for him. I think a 20-30% fail on a disable over a pure Int character is very reasonable. He can still teleport the enemy away, control the environment, buff, etc. If he could also disable just as well as the pure Int character, why wouldn't everyone be a hybrid?
You can invest in Lucky Charm to improve your hit chance for your hybrid characters.
What do you mean by an "Int hybrid"?