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Yes, it's meta-gaming, but unfortunately, it's necessary for party survival at lower levels.
As someone pointed out, unless you have a seasoned GM (or one who has the time to adjust all of the encounters) you're going to need a character who has a high BAB and one who can heal. I've seen parties try to go forward without either of those roles and it typically ends in a TPK quickly. Though, out of the two the high BAB one is the necessity.
So in short, yes it's meta-gaming, but it's necessary to a degree.