Uniques and Unique Charms:
There are a ton of useful uniques for this build, and some are competing for other spots, because of this you have a hard choice on which unique to turn into a charm. Here are the competing spots:
Chest:
The Relentless Heart is perfect for this build. But we can almost double our Toughness with
Tyrael's Might
Neck:
Banished Lord's Talisman has gives 12% damage x 12 stacks on crit, so 144% damage boost. But
Aspect of Heavenly Strength is amazing for defence, giving us 60% damage reduction.
Helmet:
Tuskhelm of Joritz the Mighty Gives us huge damage + CDR, but
Heir of Perdition is HUGE damage.
For this reason, I'd equip what we have above, and then place
Banished Lord's Talisman in our charm slot. If you manage to get a mythic seal that lets you have space for 2 unique charms, go for
Tuskhelm of Joritz the Mighty aswell
Additionally if you don't have the mythics listed above
Tyrael's Might and
Heir of Perdition take the other options.
Tempers:
Any offensive tempers, we will go for "Damage per overpower stack". We can hit upto 12 stacks, so a max roll on this being 15%, is 300% extra damage, which easily beats any other temper.
Defensively you want a spread of whatever your gear is lacking; life, armour, resistances etc.