I don't know anyone who uses just electric for Nigerians. I don't understand why it would be less fence posts for electric than it would for regular fencing. You can put the posts up to 10 feet apart for regular fencing.
My girlfriend has used electric fence for her nigerians, they seems to get through no matter how you place them.
I have used welded wire for 5 years, they can break it and tear at it so it breaks the welded part and they get through. It took a while but as my husband says "what else do they have to do with there time! "
We have the 4x4 woven now.....I dont think it blocks the view at all....
Well, our original plan was to use the no climb horse field fencing with the 2x4 spacing and run a strand of electric around the middle to try to keep them from rubbing it.....then BIL threw a hissy fit and called daddy. He is making my life miserable.....say a prayer for me.