Perma-AK Pony'Sader this is the exact build and set-up I use.
I Currently have 57% cdr without gogok stacks so have perma-AK, change trinity settings to ignore AOE and ignore fire chains, disable prioritize health globes and the bot just smashes through everything in sight without pause
Again I stress the importance of a DPS templar as your follower as it is a free 500k+ dps in rifts which help with faster kill speed
t6 rifts for pure EXP and the usually crappy legendaries
Follower
Something I think is always overlooked
I advocate gearing up a Templar follower by the following:
as you are running UNITY then forget about any vitality on any follower items, reroll any vit into something useful preferably aspd or chc (this is because max CHD is 150% for follower)
Aim for:
max CHD on relic (that will get you near to the 150% chd cap)
max chc/aspd on rings/amulets
+10%dmg,7%Aspd & socket in weapon (preferably doombringer for the +%phys dmg)
10%chc & socket for shield
put max ruby gem in weapon & Shield
With this setup your templar will be at least 600k dps which helps you burn through rifts faster too (my current templar follower is 732k dps with my crusader)
this is a big free damage boost which people seem to overlook