H with a dead man is supposedly the strongest. Most won't even make the 3rd pipe full height. It will have a foot or so stub above ground to tie in to.
Fence failures are like flat tires - I don't think there is a convenient time for either...lolWhere's that fence guy at?
I would think if you wanted good fence, especially if they are loooong stretches, the best corner you can build would be attractive.
I thoroughly regretted some of the things I've done fence wise. It's never fun to re-do it. And it always costs more money and it always fails at the worst possible time.