From the PH same effect more than once in different strengths (p172)
When 2 spell effects affect the same target only the stronger one works.
Ok with false life say you are a lvl 4 Sorc.
You cast false life twice. Rolling a 1 and a 10
You have 2 false lifes One for 5 and one for 14
Once the strong one gets weaker than the Origional weaker one, the weaker one will
take over.
Hence I'm thinking false life stacks with it self.
I think this logic would work with Vamp Touch also.
When 2 spell effects affect the same target only the stronger one works.
Ok with false life say you are a lvl 4 Sorc.
You cast false life twice. Rolling a 1 and a 10
You have 2 false lifes One for 5 and one for 14
Once the strong one gets weaker than the Origional weaker one, the weaker one will
take over.
Hence I'm thinking false life stacks with it self.
I think this logic would work with Vamp Touch also.