I'm going to suggest at least having one much lower backup option, and then 4 of those universities. I got AAACD and am applying for;
Exeter
Warwick
Bristol
Nottingham
Bangor
Bangor is a nice backup, ranked 13th by the times for psychology however only asks for 260ish ucas points and wales is a fairly nice place to live (which of 180 have to come from A2 levels).
However work out your AS tarriff points which is;
60 + 50 + 50 + 40 (+30) = 200 - 230 already.
Well that's what I did to make sure that my application was 'safer'.