This question isn't for me necessarily, it's for a friend. However, I suppose I'd like t know the answer. If a university has the entry requirements of ABB with the 'A' in a certain subject, such as chemistry, what if you get predicted an ABB but it's not in chemistry? do you think there's any point in revising?
There's always point in revising, unless you're one of those annoying people who don't. But I think you meant applying.
If it's only one choice out of your 5 and your others are more within your reach, then yes, apply. But don't apply to all 5 courses requiring more than you're predicted. A sensible spread would be 1 or 2 higher, 1 or 2 the same as you're predicted, and 1 or 2 lower. But remember you need to want to go to them all.