People have reported beating cancer with DMSO alone, though I would surely add in other items. It is usually recommended that you dilute it for oral use (you can swallow it too) as well as for topical use above the waist. For some reason, it tends to create a rash when applied above the waist but not usually so below the waist - and that has been my exact experience.
I see no problem with adding in the items you are mentioning. I can't readily find my book on DMSO, but I am thinking that the dilution for topical use above the waist is 50/50 and perhaps dilute 5 to 1 if it is to be swallowed.
If you get yours from Tulsa, then you probably get it from the same company I bought from (FWI). However, what I bought was a 16 ounce bottle. I consider that to be pretty large and it has lasted a long time. The bottle I have says 99% pure. It also says that it isn't intended for humans - lol.
Proprietarial of not, they should tell you its makeup. The items you mention should be fine to use. I would also be taking those orally - lots of the turmeric/curcumin and do it at the same time as coconut milk or oil or black pepper to increase absorption (the DMSO should do that too if you swallow some of it, which I would also do. Another items to consider swishing and swallowing would be colloidal silver. Also, oral N-Acetyl Cysteine in large amounts (say 2500 mg per day) - we consider it essential, Additionally, you might want to swish and exptorate baking soda a few times daily. It often does well with cancers it comes into contact with. And, if the cancer is reachable, painting it with iodine a couple of times daily might be good too. Don't forget the oleandder extract. The liquid version would be good for both swishing as well as swallowing.