Paying down Debt

I have some spare cash, so I want to put it down to start paying down debt.
I have 4 IPs on LOCs, on 80% value of the IP and another LOC that is for all of the 20% depositis. Should I pay some off each one, or just pick one and pay that down - perhaps the deposit one?

I would put the cash into a offset account.. not pay down the debt.. gives you the option to redraw should you need to without stuffing up the tax deductability of the loans