Yes it is hard to judge the timing sometimes, but lately I've been rocking at making 'em miss. Try starting your jinx, barrel, or whatever you do to make them miss, at about d1.2k. I find this works well. Also, go below their nose, as this makes it much harder for them to get at you.
As to the low/slow situation, you would have to be VERY low and slow. Otherwise, just dive for speed, go under his nose, and go for your reversal with as much verticle as you can manage. The end result many times will be the enemy's big dive for the HO, and your much tighter turn since you are much slower. A sharp E fighter will kill you anyway, but most pilots aren't that good. It's a better option than the HO, at least for me.
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Lephturn
The Flying Pigs