Two things happen on our farm
Perimeter fence is t post and barb wire, then we run spilts for rotational grazing between them.
We use the perimeter fence as ground with one ground rod just because. Works great.
Bottom ground with perimeter as high tensile is top ground , two hots in between, bottom ground.
This way a limb (not a tree) won't foul fence from top, grass won't mess with from bottom.
We attach ground lines direct with clips from t post purchase.
Great ground, small calves have a learning experience, and we have disconnect for lower hot line early in season when grass is strong, so no probs there.
We fall calve, so by time sep come we turn on bottom line to keep little buggers in.