No physical damage means that hatred and added fire damage will not contribute much to the elemental build .Therefore, my suggestion link is: Dominating Blow + life leech + weapon elemental damage + added lighting damage + added ice damage + multiple strikes. You can also use other unique items. If your equipment is only 5L, remove added fire damage. The improvement for ice damage is quite small with no physical damage weapon. Furthermore, the mana consumption for Domination Blow is quite horrible, 300 per attack. And we still need to use hatred and anger. So the point of shield converted to mana is a key one. Or the mana will be not enough. Of course, if you have equipment to leech mana from enemies, things will get better. Berek's Grip will be a better choice. 5% of damage against shocked enemies leeched as mana. Besides, the build requires high life. But the life bonus from passive tree is limited. You had better equip with Kaom's Heart. As for other skill collocation, you can use melee fighting skill: cast when damage taken + immortal call + shied charge + Enduring cry
At the same time, you need to use wrath and anger. If you still have enough mana, add grace and determination. - See more at: Path of Exile Templar Build: Oro's Sacrifice + Dominating Blow