Some of my perimeter is wood post-t-post-wood post. This is not field fence–it is coated wire and tape. I bought 7’ t-posts. If you line it up right, the t-posts are just holding up the high-tensile fencing–not part of the stretching action. The fence should slide through. It is 5’ tall and capped. Top line is hot. Wood is going to be safer from an impalement standpoint. T-post is easier to DIY and won’t rot.
My field fence (no climb) is all on wood posts. That is a very heavy fence. Mine are 11-12’ apart.