I agree with most of this, I think.

Building specific personas more optimized for reacting and navigating different situations and landscapes can be very useful, since they prime your subconscious and can (ab)use Type 1 processes. If the persona is well-built, the right type-1 processes can be selected automatically for situations where subconscious processes are cost-effective and optimal (for a gross simplified example, wearing a Slytherin persona can be useful for having a Type 1 process of showing the appropriate, immediate surprise and puzzlement when someone probes you on something you want to keep secret).

Wink wink: the above slytherin example comes pretty much straight from HPMoR, which is why I don't feel the need to go into details. Seriously, read it!