It seems a bit early to be ranking colleges tbh and weren’t there rumours the allocation process was going to change again?
If allocation hasn’t changed - the best way to ensure you are initially allocated a catered college would be to not put the most popular colleges - Castle, Chads, Collingwood and St Mary’s in the top four slots. Maybe use 2 possibly 3 slots (very unlikely you will get either Castle or Chads unless it is first), but then fill the other top ranks with your choice of catered hill colleges or Hatfield. St John’s is very small so include that in the stop 2/3 slots if you like it. I haven’t included St Cuths as I don’t know how the allocation works between the Bailey and the Parson’s Field rooms and I also don’t know what the current Hild Bede situation is.