Warhammer, depends on the soil you are putting the posts into.
Looks to me, from the aerial photo, you are putting things down into black soil..or at least tillable soil.
I've tried the inside post technique... physics says it should work... just get the angles right. Nope, practical experience says that after some years things will be out of kilter.
Now, if you can sink a deadman away from the pull... on the "outside" of the fence and install a wire from the top of the post to the deadman, that WILL work for a large number of years.
My experience with lots of fencing in Central Texas says you will be best suited to do the following... if questions, PM me.
You mention high tensile wire... install ratchets from Tractor Supply on each wire stretch .. leave in permanently.. allows for retensioning in future years. Works with both smooth and barbed wire... just don't drive staples all the way down to the wire.
Make each segment a straight line... don't wrap wire around the post.
Each end needs to have 3 posts... the end post and two brace posts. I know you have a huge corner post and sank it well... that's a good start...but I've learned the hard way that for a corner to hold for years you need 2 brace posts plus the corner post. Brace posts should be about 7 feet in length, many people make them too short. In addition, DON'T make it a H brace with the brace in the middle... move the brace bar almost to the top of the posts... and use a ratchet, permanently installed, as the wire brace... again, easy to tension and adjust as necessary. Use high tensile smooth wire. Learn the special knot for tying smooth wire... trust me, it's worth it...for the brace wire, make a cut in the post for the wire to lie in... a staple will NOT stay in the wood over time... will come loose and brace wire will need to be redone.
Suggested procedure: Undo wire on ends, sink post holes for 2 brace posts at about 7 foot distance, install braces high on the posts with metal pins so they stay in place, install a brace wire with ratchet so pull is against pull of the fence wire, reattach wires for each run of fence using ratchets nearest the end which you will pass most frequently... so you can retension as needed. If at all possible, install a deadman tension wire which pulls against the post which wants to lean in... cattle will not get tangled in the brace wire. Talk to your neighbor, bet they will agree with the plan. Else, install a post on the inside of the lean, about 7 feet in, install a slanted post (or pipe) so it is under compression pressure and prevents the post from leaning inward.
Good luck!