I done a bit with those steel 'wharata' post years ago out in OZ althou never had the clipex system then, either threaded line wires throu holes in post or tied them on to the posts. Go in ok with those pneumatic things, boss also had some tractors rigged up with a hydralic man crate/s on front so u could drive posts in with a jack hammer with a special bit, the tractors with 2 baskets where for vine yard fencing putting 2 lines up at once. He also had a couple of old county's that pulled 2 chappers on a trailer so could rive 2 posts at same time, cracking home made set up for the vineyards
The reason they use metal posts out in oz is timber psts split so steeples come out
I take it the strainers are conreted in? That will be ur major problem as metal doesnae grip the ground the same as timber so unless concreted in with a foot on will just pull out.
As has been mentoned any slope willl make it hard to clip nets on unless u had ur posts at 90 to ground and not plumb.
Also stocking densities in oz are tiny compared to here so how i stands up to the pressure over time. And how lon the clips last for, even the difference in climates might make a difference
Being honest if i was erecting any new fences nowadys i'd really try and put atleast 1 strand of electric instead of barb, u just don't get stock/beasts leaning and rubbing themselves on the posts and pushing fence over, last far longer