I used a metolious harness last year and switched to this guy
https://www.amazon.com/gp/product/B00YOEQTU8/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 halfway through this season.
Rock climbing harnesses kind of suck to get on over your layers.....then the leg loops tend to pull everything down as you walk. At least look for something with quick release buckles on the leg loops like the BOD, so you can walk with the leg loops unhooked and get those put on quickly at base of tree
As far as lineman hookup...use your sit drag ears. If you can sew on a little belt to keep it on your waist as you walk/climb, then the ears are going to be in position for a linemans belt. My linemans belt becomes my adjustable bridge