Yeah, intermittent fasting is useful, but only effective if used with a keto or keto-like diet. You did mention the carbs/sugars, but this cannot be stressed enough:

One cannot keep dosing the cancers with glucose/carbs and expect the tumors to die out in any reasonable amount of time. Even pure keto can still take years (2-6) to completely kill off sizable growths.

All the other things are good to throw into the mix. I've heard of Essiac (some similar contents to the mix that Sam Girod used in that video above) pills curing animals from cancer quite effectively, but again anything must be combined with sugar-carb complete and total starvation.