The advice was mainly to consider your 3a part of your global allocation because there are ways to sell conservative assets in your 3a and use the proceeds outside of it, provided there is a conservative part in your allocation and you have liquid taxable assets (which you do).
If you want to optimize the use of your 3a, @Dr.PI has made a tremendous job of assessing which assets get the most out of its tax benefits: Splitting the world. That’s advanced level stuff that is by no means necessary to get started with your desired allocation, but it’s very interesting, with good potential returns on the time taken to get acquainted with.