Tiaral

From the warehouse:
Armor (5)
Damage -40%
Arbalest (5)
Damage: 120
Helmet (5)
Critical hit against self -5%
Two-handed sword (5)
Damage: 150
Armor (5)
Damage -50%
Sallet (4) Slightly better helmets than the basic ones; I would keep 1 just in case.
Requires basic armor proficiency
Critical hit against self -15%

Relhiras's 150 damage two-handed sword, I think, should go to the warehouse.
And let Relhiras pick an armor for himself... 1-2 of the remaining ones can be sold.
I suggest the following:

Black Dragon Armor
Damage -50%
Elemental damage -50%

For Relhiras.

Valfrid's Armor
Damage -60%

For sale.
Or Relhiras could wear this set:

Valfrid's Armet
Requires basic armor proficiency
Immunity to critical hits
Rexaur's Armor
Damage -50%
Immunity to paralysis, slow, and mind control.

There is no elemental damage reduction, but it provides immunity to everything.
In any case, I suggest not selling the unique armor yet, except for Valfrid's armor.

Or have you already discussed with Ples what Relhiras is wearing?