Vitalik has mentioned that he will be utilizing all of these methods working together to help scale ethereum. It does seem like he is leaning towards not really using Raiden Network though.

In one of his blog posts he talks about how these strategies complement each other and can work together, but also states that he wants to keep the scaling solution "within the ethereum family" and is recruiting people to help create a scaling solution. This is what leads me to believe that he is trying not to use them.

If you wanted to read about it, this is his blog post from early January: https://blog.ethereum.org/2018/01/02/ethereum-scalability-research-development-subsidy-programs/