Rooted!! - Special mention to @raulcpop for the pointer! If anyone needs help my PM’s are open.
Hints :-
Crete - Do not overthink… Play around with burp & google 
Olympia - Also do not overthink - Once you find the file you have everything you need to progress…
Rhodes - Enumerate enumerate… If you run into issues it will be because nameservers… editing /etc/resolv.conf on your local box will help you
Priv Esc to Root - Do some Googling on what’s on the box! You will get there eventually.