Are you planning on breeding for hobby/money, or do you just have a pretty CT you want to breed?
What are you wanting, exactly? What kind of tail, type of look? Do you have a plan and goal that you want to work to?
I agree, CT/CT, CT/PK, CT/HM would be best.. VT will over ride the CT.
So you want just a couple of babies, or ..?
After spending over a thousand dollars for a breeding set up (with all the heaters, live plants, breeding fish, ways to keep 100+ jars warm, etc).. and that is only for 2 spawns to go at once.. it will take a long time for me to make back partial of what I spent. I have a LFS set up to take any that I have not sold through AB, Ebay, groups on FB, forum, etc.. and that still is not a guarantee that I won't be rid of all in one spawn, as spawns can be anywhere from 10 - a few hundred fish.
So if you are just wanting a few offspring, I personally can't imagine spending so much money, the hours a day it will take to do all the water changes, feedings, etc that is needed for one spawn, and the killing of a bunch of babies.. just for a couple more fish to have.
If you are wanting to breed as a hobby/business, then I would definitely listen to indjo and some of the other breeders here who can help you understand tail types and what is needed to accomplish what you are looking for. Breeding isn't easy, nor cheap - so best to understand what you are wanting and how to get it before you attempt.