How do you feel about Biology? If you think you tried your absolute hardest and gave 100% then it's clearly not looking good to go on a boost to an A if you've already given it everything you have...so then take ICT. Yes what you say is right, but it's better to be predicted 3 As with ICT, than AAB or AAC with Biology when trying for an AAA course (providing you don't need Biology for it, obviously).
If you feel there could have been extra hours put in and you think there's potential to up grades, I'd continue Biology and retake one of the exams you got lowest in and/or didn't work for as much. Hopefully the remark will up it to a B, then you'll have to convince teachers to predict you an A. Without a resit, there is almost no way you'd get an A in Biology. Unless you settle for AAB courses at most, re-sits are a must for you to achieve AAA.
You might have to only risk applying for one or two AAA courses, with the others being AAB or ABB. I know it's not what you want, but things like this happen and it's better to be safe than sorry. Plenty of excellent top Unis offer AAB courses.