Road to 3'300 and Beyond - Solid Templar Build

Road to 3'300

You do not need all purple equipment to reach a high combat power. Some players go for full purple, disregarding blue. This approach takes forever and gets you nowhere. Think about the purple traits and how much they cost in the auction house. Blue offers the better route to take. Farming proves easier, and blue remains less expensive in terms of traits.
Once you have your blue gear with all traits maxed out, you can start to farm purple.
The gear shown gets you to combat power 3'300 and proves simple to obtain.

No Arch and World Bosses

Arch and world bosses drop the best gear in the game. But getting them proves impossible for casual players like me. There exists a 0.3% chance for epic equipment. Weapons like Nirma's Sword of Echoes and Tevent's Grasp of Withering remain out of reach.

No Guild but...

As a casual player, I prefer to avoid guild involvement. In most cases, joining a guild comes with duties. You must stay online daily or complete guild tasks by 18:00 the following day. And what about loot distribution? How fair remains loot distribution with up to 70 players in a guild?
Guilds with 5 to 10 players make more sense. I started a solo guild to get minor buffs like Defense and Mana Regen.

Health Regen

Do not neglect Health Regen. Mana Regen has more priority, but having decent Health Regen can make or break a situation. As a tank, you get a lot of beating. With decent Health Regen, your Health fills up fast.

Why Endurance and Not Evasion?

Andrew from Alcasthq provides an excellent explanation for the reasons. 

https://alcasthq.com/tl-all-stats-guide/

Endurance

Melee Endurance comes first. You tank close to the boss, not far away.

3'300 and Beyond

Before going full purple, max out the traits on your blue gear. With a solid 3'300+ combat power build, farming purple gets easier.

No Arch and World Boss Loot

This build does not require any arch and world boss loot. You farm the gear in open-world and co-op dungeons. However, you still have to kill world bosses. You need 40 Special Resistance Medals for the lithograph to craft the Heroic Breeches of the Resistance.

Toxicity

The mechanics of bosses in two-star co-op dungeons can get tricky with randoms. Hence, the toxicity may multiply, unfortunately. To circumvent this, do the dungeons with friends. If you do not have friends, keep farming one-star co-op dungeons. The traits you do not need, you sell in the auction house. With the Lucent you make, you buy the lithographs for the Shock Commander Visor, Shock Commander Sabatons, and Bracers of Unrelenting. And craft them - no shame in this.

Solo Rota

I start my rotation with A Shot at Victory, Piercing Strike, Touch of Despair, Annihilating Slash, and Counter Barrier. When the mob has three stacks of Touch of Despair, I cast Decaying Touch followed by Curse Explosion. The other skills I use when needed.

With the Shield Survival Technique, I block any Fury Attack.

Party Rota

I start my rotation with Provoking Roar, Piercing Strike, Touch of Despair, Annihilating Slash, Counter Barrier, and Time for Punishment.
Controlling Rake pulls mobs to me. With Strategic Rush, I push mobs against walls and stun them (Death's Abyss) or off bridges (Butcher's Canyon). Stalwart Bastion or Blessed Barrier protect the party in dire situations. Immortal Pride and Fountain of Life I use to save myself.

With the Shield Survival Technique, I block any Fury Attack.

Temple of Slaughter

Time for Punishment gets replaced with Clay's Salvation. Clay's Salvation's Weaken Removal cleanses one firedebuff. I can tank all three fireballs. To pull this off, you have to think and act quickly.

After the Fury Attack of Rex, I get into position whilst casting Stalwart Bastion. I stand as close as possible to Rex to block all three fireballs. Afterwards, I cast Clay's Salvation and maybe Fountain of Life. 
If the paralysed player stands too close to Rex, the AOE blast could kill me and the player. Before I jump in, I assess the situation.