Any other say more comprehensive alternatives?
My research is returning options such as:
Borrowing against the portfolio and claim back interest (?), setting up family trust and / or investment company, bringing forward other paper losses to offset (?)....
If your intention is to realise the gains, I don't see much point in borrowing against the portfolio. You'd essentially be borrowing cash against cash.
You can set up a family trust going forward, but you can't shift assets into a trust without triggering a CGT event.
If you have paper losses these can be realised and used to offset gains. Unless you are a professional trader, you cannot use unrealised losses to offset realised gains. Also if you do realise those losses be careful of the wash rules if you intend re-taking a position.