I'm not too savvy on stam builds but this is my general advice about builds I say wing it start with skills you know and like and see If it works if not scrap the old skill and replace with one that suits you better. and keep building it in that way until you find you sweet spot build
The problem with Templar is you don't have any Major Brutality abilities, so either you rely on a weapon swap buff or use potions to achieve that. My Templar is more Magicka, but has some nice Stamina buff abilities, here are some suggestions:
I run a gave up on stamplar using bow, it just didn't seem to put out what I wanted so I went DW/2h and use rally with evil hunter,biting jabs and flawless dawn breaker as buffs. Although I do keep a bow in my inventory with skills poison arrow and snipe open to swap out for end bosses in vet darkshade and vet fungal dungeons.