Successful PPI Claim but what debt to pay first?

I am currently on a Pro rota payment plan for all my debts. I went through the Citizen's Advice Bureau to set up all my pro Rota arrangements and I have been paying religiously on time ever since. interest and additional charges have been frozen on all debts while pro rota payments are in place. I am currently in £10k worth of Debt with catalogues and credit cards.

I made a PPI Claim and was successful in my claim. the amount awarded is equivalent to 20% of my debt.
This was a claim against a old Historical catalogue account i had many years ago, which i defaulted on and the debt was sold off to a third party debt collector company.

As everything is frozen interest wise, i am unsure what to prioritise to pay off debt wise. I was thinking of paying off some of the smaller debts, however my payments arranged was quite low, so I wont be gaining any benefit income wise, aside from of course paying off the debt.

As the claim wont cover all the debts, and I was worried about invalidating my payment plans with some companies as a result of paying some off.

I was thinking of going to the CAB for advice but I am worried that would invalidate any payment plan they helped set up.

the best plan I came up with was clear what debts I can and keep a small amount in a savings account for any problems that arise - like needing a new washing machine, stuff like that. I know I have read that it is best put everything into debt, but i feel a little better keeping some as a back up as I am by myself and don't have people to run to in a pinch.

Any advice?

Thanks in advance!