Sadly extending away is really your only chance to stay alive vs these 3 types of planes. I typically avoid them at all cost.
There's really no need to extend "away" (as in horisontal distance). G-14's climb advantage against these types is so massive that all you need to do is out climb them and then dive on them and repeat.
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...if one doesn't 'like' that kind of fight (being the fighter with vastly more power but with higher wing-loading) well, too bad. There are things in life various people don't like. The fact just is that development in fighter aircraft (largely tied engine developement) led to a situation which saw wing loadings and top speeds raising up. Brewster for example just happens to be in the lower end of this spectrum ie. having low wing-loading and obviously having very little power compared to the late war fighters.